understanding paternity test results
 

When you do a paternity test through DNA Diagnostics Center (DDC), you are provided with a detailed report when your results are ready. The language required to be used for paternity test results is scientific as well as legal, and so it sometimes may be tricky to understand. Here’s a breakdown of the different sections in the report and what they mean, in simpler terms.

NOTE: This article refers to the post-natal test results report only. For help understanding a Non-Invasive Prenatal Paternity Test report, please contact our prenatal testing specialists at 800-303-9085 (M-F, 8 am to 5 pm Eastern). 

 

DDC Paternity Test Results Report Overview

Your DDC paternity test results report contains the following main sections, with each displaying important information.

  • Genetic System Table (Locus/Allele Sizes chart)
  • Combined Paternity Index
  • Probability of Relationship
  • Test Conclusions

 

Paternity Test Results: Genetic System Table

The DDC laboratory tests at least 20 genetic markers plus the Amelogenin locus, which shows a participant’s sex. The data for the child’s, the possible father’s, and the mother’s (if she participated) genetic systems are listed on your report in table format. Should additional markers need to be tested in order to strengthen results (as illustrated in the table below), those are also listed.

paternity test report results genetic system table

The child gets one gene on each marker from their mother and one gene from their biological dad. If even one of the child’s markers does not contain an allele that matches the possible father’s, then that possible father may not be the biological father. Using statistics, the Paternity Index (listed as PI in the table) indicates the strength of the match at a particular Locus (genetic marker).

 


Q: If everyone has two genes on each marker, why is there sometimes only one number showing on the report?

A: In most cases, a single number on the report indicates that both genes are the same number.  For example: In the chart above, 22,22 for one of the child’s markers shows as just 22. And, since she is a female with two X chromosomes (X,X), this only shows as a single X.


 

Paternity Test Results: Combined Paternity Index

The Combined Paternity Index is the number on the left side of the report (in the Interpretation section), directly under the Genetic System Table.

paternity test results combined paternity indexes

If you are considered the biological father, there is a number listed for the Combined Paternity Index. If you are not considered the biological father, the report shows “0.”

The Combined Paternity Index is an odds ratio indicating how many times more likely it is that the possible father is the biological father than a randomly-selected unrelated man with a similar ethnic background. In the example shown above, this man is 43,450,497 times more likely to be the biological father. This number varies on a case by case basis. The higher this number, the stronger the results.

 


Q: Can the Probability of Relationship ever be 100%?

A: No. DNA test results are all based on statistics. Quite simply, in order to get a 100% probability, we’d have to test every man in the world with a similar ethnic background to the alleged father being tested. And for obvious reasons, that’s not possible!


 

Paternity Test Results: Test Conclusions

Test Conclusions are located in the Interpretation section, under the Combined Paternity Index and Probability of Paternity numbers. This paragraph of text contains our DNA scientists’ conclusion about your test.

The report shows one of two conclusions: “is not excluded as the biological father” or “is excluded as the biological father.”

paternity results combined paternity probabilities

paternity test results number one If the conclusion states, “is not excluded as the biological father,” this phrase means the possible father most likely IS the biological father of the child, since all data gathered from the test supports a relationship of paternity. (See sections above for details.)

paternity test results number 2 If the conclusion states, “is excluded as the biological father,” this phrase means the possible father IS NOT the biological father of the child, since all data gathered from the test do not support a relationship of paternity. (See sections above for details.)

Why aren’t there names on my paternity-test report? 

When doing an at-home test, there are no names on the report: only an identifying number for each set of samples and their role in the test (alleged father, child, or mother). We do this because we have no way of verifying whether or not a sample submitted to us belongs to the correct participant, as indicated by the customer. However, if you choose to do a legal, witnessed, chain-of-custody paternity test with court-admissible results, then the report includes both names and our company branding. For both at-home and legal testing, the testing process itself is exactly the same, and you can be sure results are guaranteed accurate for the samples provided to us. 

Don’t hesitate to call us at 800-929-0847: We’re here to help.

If you have a general question about the info above, leave a comment and we’ll answer.

 

 

293 Comments

    • Hi, Trice. The prenatal paternity test is different from a postnatal test: For a prenatal test, approximately 2,698 genetic markers are compared, whereas with a postnatal test, comparison of 16 markers are generally all that’s needed for conclusive results. It would be impractical to list data for nearly 3,000 markers on a report, so we give the conclusion only. Hope this helps!

      • Hi, Krischen. Can you please clarify? Were you given a 99.99% probability of paternity yet the conclusion says he is not the father?

          • Hi, Sherrie. As high as that probability is, it’s not considered conclusive. With today’s technology, a good accredited lab should be able to test enough genetic markers to provide either a 99% or higher probability of paternity (if the man is considered the biological father of the child tested) or 0% (if he’s not considered the biological father of the child tested). You may want to call the lab where you did your testing and ask some questions.

        • Just got results and it says 0% chance that my brother in law is the father. The girl swears he is and is wanting another test done tomorrow. We paid for overnight shipping $90. Same day results so we are at about $300 for this paternity test. Is there anyway your results are wrong?

          • Hi, Amanda. The age of the baby doesn’t affect test results. You didn’t mention if your brother-in-law did a home test or a legal (witnessed) test with court-admissible results, so I’m going to assume you mean a home test. You also didn’t mention whether we did the testing or not, so I’ll assume we did. You can be sure the results are accurate for the samples we were provided. Every test is run twice, each by a separate team, to ensure accuracy once samples arrive at our lab. What we don’t have control over is the DNA collection process. For example, we have no way of knowing if the alleged father really swabbed himself or used someone else’s DNA instead in order to commit fraud. If you’re absolutely sure he submitted his DNA and the baby’s, then there is no question that he’s not the biological father. If you want to do a legal chain-of-custody test just to put the issue to rest once and for all, then that’s an option.

      • hii they send me so the tests involved taking buccal swabs from each person .l have ensured a clear and verifiable strict chain of custody of each sample provided These tests produce a reliability of paternity of greater than 99.99% and under Results Shane is not father Kate.l dont undertand this is possitive or negative results thanks

        • Hi, Krischen. If the probability given on your paternity test is 99% or higher, then the man tested is considered the biological father; however, due to accreditation requirements, the language that is used on the report is “not excluded,” and perhaps that’s why you’re confused. It’s a different way of saying it, but it also means that he is considered the father.

  1. Yo me hice una prueba a la 8 semana de gestación y salio excliyente este resultado lo puedo considerar sin margen de error

  2. Una pregunta me hice una prueba a las 8 semanas salio excluyente ese resultado lo puedo considerar que no hay margen de error

    • Oh ya veo. Lo siento! Nuestros procesos de prueba de ADN son confiables y seguros y garantizamos resultados. Puede estar seguro de que los resultados son precisos para las muestras de ADN que nos dieron.

    • Hi, Hannah. What an excellent question! Nothing is sent to the billing address unless the customer requests it. Most often they request a hard-copy of their results, but that’s the only time.

    • Hi , so I did prenatal paternity test when I was close to 11 weeks and it came out my bf was excluded with 8 mismatches , however they rerun it again and I was told that out of 8 mismatches 4 matched and the other 4 seem to be matching too , so I was told to do another blood draw and I told I can ask another guy to send his chick swab and the lab said they don’t need it but will run my boyfriends and after I received a letter that my boyfriend was the father with the probability higher than 99.0% so I don’t know or can I trust this lab now , besides that on a letter wasn’t shown the alleys that matched just written his the father , and the answer how come that first time it was excluded they said it’s because there was not enough fetal DNA signal or too weak so now I’m concerned can I trust the final results ?

      • Hi, Natalie. Our lab doesn’t analyze prenatal tests the way you describe and so we’re not sure how the lab you used came up with its findings. If you have any doubts about the results from that lab, then it would probably be wise to do a postnatal test once the baby’s born.

  3. Will a guy get the results to an in office dna test if he is found not to be the father? Who get the test results? Do the guy recieve results only if he is found to be the father or does he receive results if he is not the father as well? How low does results take?

    • Hi, Summer. Test results are posted to a secure online account that is set up by the customer. If you participated in a legal, witnessed DNA test and do not have access to the login information, you still have a right to see the results. You just need to call us. Once samples have arrived at the lab, results are posted in 1-2 business days. If you have more questions, feel free to contact us directly at 800-681-7162.

  4. If the test was done in a lab who gets the results and how ? How can you tell the difference between doing a home test DNA and going into the clinic test results ? If you go to a clinic would the names of the people tested be on the test results ?

    • Hi, Karla. All DDC testing is done right here at our full-accredited on-site lab. I’ll be happy to address each of your questions:

      (1) Results for an at-home test are posted to a secure online account, with the username and password being set up by the decision-maker on the test (usually the person who pays for it). Results are never given over the phone, but a hard-copy of the results can be mailed for a small extra fee. If the test is a legal witnessed one, the process for obtaining results is exactly the same, if it was paid for by a customer. If it was paid for by the courts, results go to the court.
      (2) and (3) The difference on the results report between an at-home test and a legal test (where DNA collection and submission to the lab is supervised at an approved facility, such as a clinic, or by an approved party) is that the at-home report does not have names but the legal report does have names. The reason we don’t put names on at-home tests is that we have no way of being sure that the DNA samples submitted actually belong to who test participants say they do. So instead, we assign numbers to identify the samples. Now, when the test is witnessed, IDs for participants are verified and the DNA collector handles all the samples, from collection to mailing, so we can be sure samples are from the correct people listed on the test.

      I hope this helps. If you have any other questions, feel free to reach out again!

  5. If i went to a a lab to get the dna test done then why do my results say that they were not collected by a third neutral party ? Am i able to go to the clinic that i went to, to get my test results or how can i get that from you guys ?

    • Hi, Karla. I cannot discuss your particular case on a public forum. So I suggest you call us directly so one of our specialists can access your account and give you the information you’re looking for. That number is 800-681-7162.

  6. What should I do if the alleged father don’t want to show up or I personally don’t want the possible father knows or realizes the prenatal DNA test, is there any other way to do the test? For example, could i use other sample, like nails or hair with root instead of swab ?

    • Hi, Linda. That’s an excellent question. Trying to use nail or hair samples instead of a cheek-swab sample from the possible father is risky, because there’s no guarantee the samples you send us contain enough quality DNA for testing. For this reason, we haven’t validated the use of alternative samples for prenatal testing…it’s too hit and miss. As a highly-accredited lab that does its own testing, we only accept cheek-cell samples from the possible father for prenatal paternity tests. This guarantees we have enough DNA to run the test twice to ensure accurate results.

  7. If an at home test was done. Is there any way to get the names on the results? Could you pay extra money to get the names on it or would you have to see a valid drivers license? How does that work?

    • Hi, Whitney. The reason we don’t put names on at-home test results is because we have no way of verifying that the samples submitted really do belong to the participants named on the case. We still put identifiers on the report such as a sample number and the person’s role in the case (child, or alleged father, for example), we just cannot put names. Nevertheless, the results issued are guaranteed accurate for the samples we are given to compare. With at-home testing, the whole process is on the honor system, which is why results aren’t court-admissible. Once an at-home test is complete, you cannot pay extra to have names put on the report because the issue is still the same: not knowing for sure who the participants were.

      If you were to pay a little extra do a legal paternity test, then names are put on the report. This is because DNA collection and submission to the lab is witnessed by an approved and trained DNA collector who checks IDs and verifies that the samples for testing belong to the participants whose names are on the envelopes. Because the process is supervised by an impartial witness, names go on the report and results are court-admissible. In your case, if you want names on the report, you’ll have to do a whole new test and arrange for it to be a legal one. I hope this helps! For more details, you can visit the link below and/or call us at 800-681-7162.
      https://dnacenter.com/dna-paternity-test/legal-dna-paternity-test/

  8. i done my dna testing at a building called medical testing resources and i see the paper have ddc on them my question is can i view my results online? is 99.99999999997 or 99.999999999996 accurate dna test results? I have taken dna test before and they never came out with these results.

    • Hi, Goldy. It depends on whether your test was ordered by the court or not. If it was, you may have to go through the court in order to see your results. If not, you’re welcome to give us a call at 800-831-1906 and we can help you out. As for your second question, 99.9% plus any other number after it (7 or 6) is as clear an indicator as you can get of a biological father/child relationship. That little bit of a difference in the numbers is insignificant. Either number would be accepted in any court of law in the country as an indication of paternity. Hope this helps!

  9. Hace unos 7 meses me hice una prueba de paternidad prenatal el resultado es excluido mi pareja tenia justo 8 semanas puedo considerar que este resultado no tiene margen de error la prueba se hizo en la ciudad de mexico

    • ¡Hola, Lian! Si la prueba se realizó en un laboratorio acreditado, puede confiar en los resultados. Sin embargo, para confirmar, es bienvenido a hacer otra prueba ahora que el bebé nace. Por favor llame a nuestra línea internacional al 1-513-881-7800 para discutir su caso.

  10. If when I put the swabs in the envolope and they’re still wet can that in anyway effect the results of the test even if I put the cotton swabs in opposite directions so they wouldnt touch also if it was raining the day I turned it in can that there for carry the dna into the other swab and it be incorrect ? My results read 99.99999999998 does that last 8 mean there’s possibility I’m not

    • Hi, Gre. The lab can tell if there are two different DNA profiles on a swab. If it’s contaminated in this way, testing is suspended and the customer is asked to submit new samples. If you were issued results, then contamination was not a problem with your swabs. As for the probability of paternity you were given, that is an extremely high percentage…almost as high as you can get. Had this been a legal test, the court would recognize you as the biological father of the child. Results for a paternity test are obtained using statistics and a mathematical formula. Because it’s impossible to test every man in the world of the same ethnic background as you, there can never be a 100% probability of paternity. Hope this helps!

  11. What does this sentence mean? Does it mean that the results show that the father is only 0.50% the real father? Help plz.
    >>>This probability of paternity is calculated by comparing to an untested, unrelated ,random Individual of the Hispanic population
    (Assumes prior probability equals 0.50)

    • Hi, Marii. No, it doesn’t mean that at all, so no worries! Paternity-testing analysis involves statistics, and this sentence just shows the baseline used to calculate results.

  12. Could there be a false NIPP exclusion?
    Should I take a post paternity test in hospital?
    Can the cheek swab be contaminated and mess with result?
    Can not having enough DNA for the fetal profile draw an exclusion result, or no reslut?
    Has there been an outsome of no reslut? Exclusion and not exclusion?
    How can I retrieve my profile of mother, fetus, and alleged father?

    • Hi, lbk! Let’s address your questions one by one:

      Could there be a false NIPP exclusion? If the test is performed after 8 weeks’ gestation through a highly-accredited facility like DDC, then you can trust results. There are specific metrics we follow to ensure accurate results, and if those metrics are not met, then we do not issue a report. Ours is the only NIPP test on the market that’s been validated and published.
      Should I take a post paternity test in hospital? You can do a postnatal test (either an at-home or a legal one) also, but it’s not necessary to confirm results.
      Can the cheek swab be contaminated and mess with result? If a swab is contaminated, then the lab will suspend testing, not issue results, and ask for new samples. To ensure the man submits his own sample and not someone else’s, his cheek-swabbing should be witnessed either by the woman being tested (for non-legal testing) or by an approved witness (for legal, chain-of-custody testing with court-admissible results).
      Can not having enough DNA for the fetal profile draw an exclusion result, or no result? No. If there is not enough DNA for the fetal profile, then another blood sample will be drawn. No results are issued at all if there is not enough DNA to produce accurate results one way or the other.
      Has there been an outcome of no result? Exclusion and not exclusion? I can’t speak for other labs, but we do not issue “inconclusive results.” If there is not enough free-floating fetal DNA to get conclusive results, then we’ll ask for a new blood sample from the mother.
      How can I retrieve my profile of mother, fetus, and alleged father? For a postnatal test wherein only about 16 markers per participant is analyzed, we do provide each participant’s file in the report. Because we test thousands of SNPs (genetic data points) for the NIPP test, it is extremely difficult to format all the data, and so we do not make individual profiles available.

  13. Hi
    I did a NIPP test a couple months ago. it came back with a 99.9% probability…. which was actually in my favor….
    Have you ever had instances where the results were wrong? I am so happy that the test is in my favor , but paranoid that it could be wrong.
    Also I didn’t request to find out gender of the baby and only now realise that i could have gotten that also, is it still possible to get the gender?

    • Hi, Kris. The technology has gotten so precise in the last few years and our processes are so strict that, at least at our lab, there have been no incorrect results. As for gender of your baby, you can still find that out, but there is an additional $100 fee. Please call us at 800-303-9085, and all the best with your pregnancy!

  14. Hey I was wondering when I will have the results for the NIPPT I did on Friday? And for the login to get results can I log in as many times as I want or is it only a one time use?
    Thanks

    • Hi, Brigitte. Thanks for testing with us! It generally takes two business days for samples to arrive at our lab, then results are posted to your secure online account in approximately seven business days (unless you paid extra for express results). Once your report is ready, you can access it as often as you like for 90 days. Most customers download the report so they have a permanent file. If you have further questions, by all means feel free to contact our NIPP specialists directly at 800-303-9085.

  15. Hi, I had done a paternity test back in 2009, and I believe I misplaced my original test results document. Is there any way I could receive another copy by mail?

  16. I had a DNA test completed in April of 2009, at the request of the paternal mother (no court order) and am now questioning the legitimacy of the DNA Test Report, as I’ve been reviewing multiple issues/items and in reviewing, realized that the “Date Collected” is showing 4/27/2009, and the date completed “Subscribed and sworn before me on April 30, 2009”. Everything I’ve read on your FAQs and estimated testing timelines would indicate that there is no possibility of a 3 day turn around on these results. Is this a feasible turn around time for a DNA Paternity test in 2009, or should I investigate the potential that this document was forged, and seek legal counsel?

    • Hi, CJ. If the samples were overnighted to our lab, it’s very possible that we could have met that time frame. In 2009, turnaround times for paternity tests were 1-3 business days. You are welcome to contact us directly and we can look up your case for you: 800-831-1906.

  17. Thanks. I have read your response so many times , and yet I find myself worried daily that when I finally have this baby the test will be wrong and I will lose my husband and family forever. I have faith in God and know that the science behind this test is accurate but cant help but be super worried. Everything is at stake for me.
    As mentioned before the test shows that my husband is the father…. 99.9% probability of paternity, he does not even know he was testing for paternity, he thinks we were chosen for a random test , thanks to my Doctor….. so he has no clue that paternity of this child is in question…. can’t wait to have this baby and for all this stress to be over.
    i feel like i need constant reassurance that the results of this test is accurate 🙁

  18. Hello…

    I did a DNA test exactly when i turned 8 weeks. It was determined that alleged father was not the father. Any way that there wasnt enough DNa still and is why it gave those results or 8 werks is sufficient to determine?

    • Hi, Jeanette. You don’t mention whether or not you tested with us. I can’t speak for other labs, but in our case, had there not been enough non-cell fetal DNA in your bloodstream to effectively test, we would not have issued results. Instead, you would have been asked to submit a new blood sample a week or so later. We can definitely get conclusive results as early as 8 weeks.

      • I did it through you guys yes. I thought maybe “not having enough dna” would just give me a result showing “hes not the father” . So there is indeed a way to know if it was “to soon to test”?

        • Yes. As I mentioned, if there hadn’t been enough DNA to test, the lab would have determined so during testing and would not issue results at all, one way or the other.

  19. Greetings,
    What are the odds of having a mismatched number due to a mutation of the gene? I had a test done through a different facility and it showed there were two mismatched loci strings present. I understand it is somewhat of a rare occurrence to have one different due to a mutation but with two, I can be pretty certain with the results or no?

    • Hi, Erik. The frequency of a mutation at a particular locus in a specific population group depends on many factors. The odds for a mutation (or two in your case) is taken into account in calculations for paternity. In some cases, the lab will test will test additional genetic markers, if necessary, to confirm results. If you went with an accredited lab and you were issued results, they can be trusted.

  20. I will be retesting with the same individuals as our first test. I’m happy with our results, but fear they could be wrong based on what I’ve read online.. my question is, if we are doing the same exact test with the same people, will the alleles match up or will they be different? I will be comparing the two tests side by side so I’d like to know in advance so I’m not confused or worried the lab mixed something up one of the two times! Thanks

  21. Do you think you don’t need to know the origin of alleged father? I have such a doubt that, if the potential fathers have the same origin however the mother has different origin ( for example, fathers have African origins but mother has Asian origin). Paternity test will give positive for most of the African man. Probably, laboratories where test done, they don’t have the entire genetic codes in their genetic pool from African. So that I am pretty sure that in his situation not easy to verify since as far as I know DNA test using basically Alleles similarities.

    • Hello, Siga. When doing paternity testing, ethnicity is taken into account when calculating probability of paternity. The mother’s ethnicity does not matter. Because a child inherits 50% of their DNA from their mother and 50% from their father, the only way a man can be considered the biological father is if every genetic marker tested matches exactly with the child. This is regardless of ethnic origin. If they do all match, then a probability of paternity is generated, taking into account ethnicity. If they don’t all match, the man is not the biological father, and the man’s ethnicity is a non-factor.

    • Hi, Carol. If you used the postage-paid envelope included in the kit, it can take 7-10 business days for the post office to deliver your samples. Once samples arrive at the lab and testing begins, however, your report is posted to your secure online account in 1-2 days, depending on which kit you purchased. Hope this helps!

  22. i wanna issue my question again.
    Do you think you don’t need to know the origin of alleged father? I have such a doubt that, if the potential fathers have the same origin however the mother has different origin ( for example, fathers have African origins but mother has Asian origin). Paternity test will give positive for most of the African man. Probably, laboratories where test done, they don’t have the entire genetic codes in their genetic pool from African. So that I am pretty sure that in his situation not easy to verify since as far as I know DNA test using basically Alleles similarities.

  23. I did a sibling DNA test of mine n my two kids in the mother of two kids.the result is both kids safe same biological father.without fathers swab how can it tell 100 true result please tell me.its writer DDC name in the mail in I’m from srilanka

    • Hi, Maaa. It’s like putting together a genetic puzzle. Analysts can put all the pieces of each individual’s DNA together to create a picture of their biological relationship, so to speak. In many instances, relationships can be established in this manner if the alleged father is not available for testing.

  24. I have typed below the DNA Laboratory Report.

    Conclusion:
    “The DNA profile from Child is consistent with having come from an offspring of her Mother and Alleged father.

    The DNA profile from Child in this nation’s population is 367,400 times more likely to be obtained if she is an offspring of her Mother and Alleged father than if she is an offspring of a random, unrelated man.”

    Only these two statements are in the conclusion. My question is:
    Are the two statements enough to say that the Alleged father is the biological father?

    TAKE NOTE:
    1. Combined Paternity Index either 99.9% or 0% IS NOT INDICATED in the report.
    2. There is NO CONCLUSION stating either
    “is not excluded as the biological father,” OR
    “is excluded as the biological father,”

    Please reply to this so it could help us with our existing problem.

    • Hi, Rojh. The language used by the lab you tested with would certainly seem to indicate that the child is the biological offspring of the alleged father. However, this is not the language that must be used by accredited laboratories, as you mentioned in your “TAKE NOTE” section. It would be advisable to contact the lab where you tested and ask questions.

  25. i was told by the mother that my test showed i was only 80% that the child could be mine..i dont know much about DNA but i think its either 99.9% or zero…question is can it really be at 80%? ..thanks

  26. I had myself and my son tested in oag office in one county.. The alleged father got tested 2 months later in oag in another county.. Would the timeframe between the two separate tests change the test results or how does that work?? I was shown a picture of the guy tested but I could tell if it was him because it was so blurry.. Should I have another test done w the other parent in the same county/office??

  27. it was done in January at the Eureka Labs in Guyana and send up to your company. The results received is on the letter head of Eureka Labs, would that be so or would the results be on your company’s letter head? The results only shows 3 columns instead of the 4 shown as example. The column with the figures are missing, would that be so.
    Thanks for your help in this regard

  28. I got a full siblingship test done on my son and daughter and myself (I’m the bio mom) it came back that there was a 35.7% percent chance they are full siblings and .55 sibling index. How accurate is this?

    • Hi, Natalie. This is not considered a conclusive result. You may want to contact the lab where you tested for clarification.

  29. Hi just a question about the prenatal paternity test
    I was wondering if there was a lab error in labeling samples and the mothers DNA ended up being tested against the fetal DNA instead of the fathers then this would give a false positive result?

    • Hi, Madison. The mother’s DNA profile is determined from the blood sample, along with the baby’s. The alleged father’s comes from the cheek-swab DNA sample. As a highly-accredited lab we have processes in place to prevent any type of errors in testing and analysis. So, no, a “false positive” result is not possible.

  30. I just need some reassurance. I did the prenatal DNA test and the test came back in my favor but so much is at stake for me so I need to know I can trust my results and I can quit stressing. I am due in 3 weeks

  31. Hi with the prenatal paternity test how many snps are analyzed between the fetal DNA and the fathers? And how many of these have to match to determine a 99.9% positive result?

    • Hi, Ariana. The process of analysis for determining a probability for paternity with prenatal testing is different than for postnatal testing. Over 2,000 SNPs are analyzed in total, vs. the standard 16 for postnatal testing. However, the upshot is the same: all markers must match the alleged father in order for there to be a 99% or higher probability of paternity.

      • Ok thank you. Also I was reading that it’s better to submit samples from all potential fathers if you can only test one person will this affect the result?

        • Not necessarily. If you get a conclusive result of 99% or higher with the first man tested, that answers the question of paternity (unless there’s another possible father who’s a close biological relation of the man being tested). Of course, if the probability of paternity comes back at 0%, then others would need to be tested.

  32. I was wondermg the same thing. I only tested 1 man and my results were >99.9 so am I good? I can trust these results? No need to test the other man?

  33. Is there a Report Date listed at the bottom of the DNA Test Report alerting to when that particular report was received and/or tested?

  34. We are having trouble understanding the test results. The possible father has passed away and we had his sister tested with my daughter and myself. The combined relatedness index is 0.0491 and the probability of relatedness is 4.7%. The lady that read the results to us said that she has never seen the (probability of relatedness) come back like this. She said that they should of came back 0%. Is that true? What does it mean since it came back 4.7% on a avuncular? Could his sister be my daughters aunt? Could he be her father? Would it of been better to test his mother and not his sister? What percentage of DNA does he share with his sister? Are the results inconclusive and if so what do we do next?

    • Hi, Chasity. It’s actually not unusual with an avuncular test (or any other family-relationship test other than straight paternity) to have a probability of relatedness with a number like 4.7%, so I’m not sure why the lady at the lab where you tested would say what she did. Your results mean that there is a 4.7% probability that your daughter and her aunt are biologically related. This very low percentage of probability and weak support for that relationship. Unless there are other close biological relatives of the possible father that you can test with, there really isn’t anything else that you can do.

  35. So if I were to receive my results online and the date of the report was 04/01/2018, that would be the date it was tested or the date in which I received my personal DNA report online?

    • Neither, actually. It is the date on which the analysis was complete, the report was generated, and the case was closed. It isn’t necessarily the date on which you received that report, because the lab fee must be paid in full before the report is released. For some people, that could be a week later, for example.

  36. How can I verify my test was actually performed here and the paper work/test results were not compromised prior to my self receiving it, do you keep all results on file? If so how can I receive results directly from here

    • Hi, Aj. I’m assuming you did your test through an affiliate of ours and not directly through our lab? If so, they own the results and we do not have the authority to send them to you directly. It would be fraudulent for anyone to compromise the integrity of results and highly unlikely that anything of that sort would have occurred.

  37. My test said 0% would is there any possibility I made a bad stabbing???? Or incorrectly I’m actually devastated but need to know

    • Hi, David. If there had been any issue with swab contamination or if there had not been enough DNA to test thoroughly, the lab would have suspended testing temporarily and asked for new samples (without issuing results), so your swabbing wasn’t a problem. If you used an accredited lab like ours, you can be sure the results are correct for the samples we were provided. Did you personally witness the swabbing of the child in the test? Are you sure the DNA submitted was the child’s? When doing an at-home test, we always recommend that everyone swab in the same room together, if at all possible. If you did not witness swabbing or live in a different state, you may want to consider doing a legal, witnessed test, for your own peace of mind. If the test you did already was a legal one, then there would be no need to test again.

  38. I had a DNA test done a couple years ago and I am just now going to go to court(yes I know it can not be used in court). I tried calling to see how to better understand how they received the results. I am asking because none of my #s matched those of my daughter but they did match the apparent father. Could there of been a mix up with the samples that were sent in? How could none of my #s match but every single one of his matched? I just want to be sure I do not need to retest before going to court.

    • Hi, Araceli. I cannot discuss a case in a public forum, per HIPAA regulations, but I have sent you an email. Please look for it in your inbox or spam folder. It is from DDC (DNA Diagnostics Center). Thanks!

  39. On the results:
    1. If the child is a girl, are numbers in the Y column for the potential father factored in as matches in either XX column for the child? How is it shown which parent contributed the allele number listed or is it mix and match from the parents in pursuit of a positive match?
    3. Ethnicity- What if the Ethnicity of the alleged father is listed incorrectly? If the father is listed as a specific ethnicity but is in not that ethnicity but instead mixed.

    • Hi, Vivian. Yours is an excellent question. No, the X and Y columns do not reflect which gene the child got from the dad and which the child got from the mom. The data is mixed. As long as the alleged father and child match at every one of the markers (regardless of the order in which they are presented), that’s what matters for a positive probability of paternity. The ethnicity helps calculate the Paternity Index for each location and can also help if there’s a mutation, but it doesn’t change the conclusion of the test. Hope this helps!

  40. i had one question if the test reults read 72,678 cpi and only had 99.998% isnt this questionable especially if the mother has slept with other close family members. also ddc wasnt aware before the testing but now they are do you think the results will be different when they do the extended testing since now they know..?

    • Hi, Melissa. The original calculations for paternity were made and the numbers you gave reflect the fact that the assumption was made that there were no other possible fathers who are related to the man who was tested. This type of situation is exactly why we advise customers to let us know ahead of time prior to testing. I can’t make a prediction on the outcome of new testing and anything I say would just be an opinion. You’ll have to see what the science has to say.

  41. Hi, my question is; even though the alleged father and child is being tested (not mom) how many swabs or packs come inside of the home DNA Test? Are the amount of swabs or packs of swabs based on how many people are being tested or is there a set amount?

    • Hi! Standard for retail kits sold at stores come with testing materials for three people (12 swabs total). When you order from the website, the total of swabs is customized to the number of people being tested.

  42. So we had a test done Sept 2017 that came back and said I was 99.9% the father, then we had another test done May 2018 now it says I’m not the father. My concern is the person who did the 2nd test says in her letter she has been an expert in paternity testing since Dec 2016. Is there any way she could be wrong, I heard the fetus testing is not always accurate but how can one be 99.9% I am the father and now the baby is born coming back total opposite. Who is right and doing a 3rd test is just adding more stress.

    • Hi, AJ. It’s impossible to get a 99.9% probability of paternity by mistake. Please make sure you’re using an experienced, accredited lab for all your testing.

    • Hi, Tee. Anywhere between 9% and 89% is considered an inconclusive result. In order to get more conclusive results, additional biological relatives would need to be added.

  43. hi if a prenatal paternity test gives me the result of paternity being higher than 99.0% is that reliable result? I’m not sure should it say 99.9%?

    • Hi, Lisa. Whether your results are 99.0%, 99.5% or 99.999999999%, the difference is teeny tiny and really doesn’t matter. The probability of paternity you get depends on many factors and data that go into the analysts’ calculations, and as long as the probability is higher than 99%, the results are definitely conclusive. Hope this helps!

  44. On the test it asks for your race if you put the wrong race could you get wrong results? The test says it uses your race for comparative calculations. So if the mom is white and the dad is black and you put the baby is white which is obviously not the case could the results be a false negative on my mistake?

    • Hi! That’s a great question. Making that kind of mistake doesn’t affect the conclusion of whether or not the man tested is considered the biological father; all it might affect is the percentage of probability number if the man is considered the father. For example, the probability of paternity might be 99.5% instead of 99.99%. But it would still be considered a conclusive result.

    • I got my results back on the non invasive prenatal paternity test & it was a 0%. Is there anyway this could be inaccurate? I could see a 99.9% easier to mess up rather than a 0% due to being related, blood transfusion etc. This is determining if I keep my child or not so I really need to know that my results are correct. Thanks!

  45. How many numbers can you have between the mother and the father that’s alike before it becomes a false test I have 8 numbers alike between the both of us she white I’m black so how can you determine I thought it couldn’t be no more than 4 that can be alike on a test

    • Hi, Snoop. With a paternity test, the question is more about not how many matches there are, but rather, how many mismatches. As human beings, we all share DNA in common; in fact, if you and I did a relationship test, chances are good we could match up at 7 or 8 or more loci, just because we’re human beings. What matters in trying to establish a father/daughter or father/son relationship is if ALL the numbers match at the same locations for the genes tested. Because a child gets 50% of their DNA from their bio dad, one of the numbers at each location would have to match his if he’s the dad. That being said, there are sometimes exceptions. One or even two mismatches might be acceptable if analysts determine there’s a genetic mutation at a particular locus. Some mutations are common at certain genetic locations for Asian people, for example. That’s why we ask for participants’ race when setting up the test. All of that is factored in when analysts do their calculations to determine a probability of paternity. With today’s technology, getting an “inconclusive” result for a straight paternity test (father/child) doesn’t happen if you test with an accredited lab like ours. We just keep testing more markers, as necessary, to get a conclusive result: either 99%+ if the man is considered the biological father, or 0% if he’s not. Hope this helps!

  46. Do you ever give NIPP chain of custody test results over the phone? Does every NIPP chain of custody test include online test results? My son is being told he is the father of a child but he has never seen any written or online test results. Only a verbal comment from the mother who said she was given results over the phone (she used one of your testing facilities).

    • Hi, Elaine. We do not give answers over the phone. All NIPP chain-of-custody tests provide online results. As a participant in the test, your son has the right to request his own set of results. Your son should give us a call at 800-303-9085.

  47. My question is, my brother recently had a DNA test done to see if he’s the father. The results were 99.99, so my question is, is it possible to have a 99.99% and the child doesn’t have any resemblances of him at all?

    • Hi, Jeff. Yes, for sure. There are many children who doesn’t resemble either parent, even though they are their biological parents. What we look like just depends on the genes for traits we happened to inherit over several generations.

  48. If I didn’t test all possible fathers and just did 2 out of the 3 and got a result back saying one is the father how accurate would that be ?

  49. Hello,I would like to know if I pay for a second parental paternity test (the first one I did was trough a clinic in Romania who said they have parternship with DDC Ohio but somehow I don’t trust the results ),Can I pay for a second test at DDC Hammersmith London (this time I wanna make it for legal purposes as well,the first one was just piece of mind )but the main question is :if I pay for a new test it will be runed a second test again?I hope it won’t be use the names from the first one to match the results without being verified again .Thank you

  50. Because I tested with a clinic (in Romania )who said they send my blood samples to ddc ohio can I email you my case number and get more details about my case and the results ?

    • Hi, Irina. All communications must be made with the clinic in Romania. We are a contractor for them and do not own the results, therefore we cannot comment on them.

  51. If I got pregnant straight away afther a miscarriage (I misscaried in end of may and got pregnant mid of June ),now I am 16 weeks pregnant with the second baby ,can the previous DNA of the first baby who I lost in 5 weeks influence my new results ?

    • Hi, Ali. You ask a very good question, and I offer my condolences on your loss. The answer to your question is no. Fetal DNA is expelled very quickly following the end of a pregnancy, so there would be no effect on your test now.

  52. Thank you for your answer .I would like to also ask you how reliable is the prenatal paternity test?If it comes positive or negative can I rely 100 procent of my result in order to make a decision with my pregnancy?Is any chance to retest afther birth and have a different result from the prenatal test?Also are human or genetics error common?

  53. Took a court ordered paternity test 5 months ago and never received resluts…does that mean its negative? When will i receive the results? Does the court have to send me a copy?

  54. Hello,I would try to make a little summary to get the best answer for my question .I have a booking for a legally prenatal tomorrow morning in London .In the last 24 hours because I experienced huge chest pain I went to the doctor .Long story short it was not the heart who gave me problems it was the lungs ,so they gave me an injection in my belly to stop potential clots to develop in my body (they injected a certain type of coagulant )Because I started to throw away blood in the morning I came back and I need to have like a special X ray to check some things about the lungs ,that will also involve giving some medicine to make lungs more clear at the scan (I don’t know the substance who I will be given yet ).My question is all these coagulants and the other substance can affect my blood test?Can it give me a false positive or a false negative or it will come back worse case scenario not concludent and I will need to retake blood .I would appreciate a lot if you have the amiability to ask a doctor or a person from the laboratory about the effect of coagulants regarding to DNA.Can they affect my DNA in any way?I already paid the deposit and I have a booking tomorrow at 10 in London but if my blood is not concludent I will like to rescheduale .Thank you a lot for your help

  55. Hello, I am reading all the question and I am very impress with the responses, such a good explanation about the alleles and the CPI, and everything in between.
    Now, have you ever seen a case where two men one being the real father and another totally (unrelated) test positive on the paternity test, on the same child? meaning both having all the 15 markers positive on the paternity test
    I understand this it is a very difficult and an unlike situation, since your company probably run thousands of DNA paternity test per day, I would like to know how rare this situation can be

    • It is as rare as the CPI for each case. For example, if a CPI is 1,000,000, there is a 1,000,000 to 1 chance that an unrelated, untested man with the same ethnic background could be the biological father. I’ve never heard of an unrelated man also getting a positive result. If you think about it, the chances of one woman having sex with the other man who might also test positive is practically impossible. This is why legal paternity-test results are accepted as proof by courts worldwide.

      • Thank you for the reply, I have been trying to learn more or as much as a can about predisposition for a certain genetic diseases, in particular I am trying to learn if there is a genetic marker or, if there is any genetic predisposition for MCTD, I found genetics to be a as fascinating as challenging, I did not know anything about the process of unveiling the information of DNA, my knowledge about DNA is very limited, I found DDC to be a good source of information, and explain everything in a way that any body can understand the very basics of DNA . Reading other people questions and your answers responded to many of mine, and undoubtedly new questions pop up in my head, It is obvious that DDC is a very dedicated company and conduct everything in a very professional manner.
        One last question, It is possible for your company today or in the near future to analyze DNA to see if we carry one o many genetic diseases?
        Thank you very much and keep up the great work

  56. Hello,are parental legal paternitaty tests double checked in comparison with the piece of mind ones ?What is the exactly my difference between them?Also are the blood tests analized by 2 teams or just one team?Would you run the test again even the same people already tested with you?

    • Hi, Gina. I’ll address your questions one by one.

      (1) Legal paternity tests are run twice to ensure accuracy, and so are at-home tests
      (2) There are two main differences between legal and at-home tests. Simply put: DNA collection for legal tests is supervised by an independent, approved witness and IDs are checked to ensure that test participants are who they say they are; and results for legal tests are court-admissible (since a chain of custody for samples is maintained throughout). At-home test results are not court-admissible since there is no way of verifying participants’ identities.
      (3) With certain exceptions, we use cheek-swab DNA samples for post-natal paternity tests and not blood tests. But samples are tested by two separate teams.
      (4) We run every test, regardless of whether the same people have tested with us before.

  57. Hello I did a prenatal test last month and I tested the guy who I was hoping was not the father and he was indeed excluded. I am just hoping the results are accuracte. I did go through DDC and was sent to a lab here in my city at “Any Lab Test Now”. The only thing is he went on one day and I went the next day so we got our test taken on two different dates but mailed off together. When I first got there they couldn’t find his swabs, then they “found” them. Is there anyway possible that the lab facility could have shipped off another man’s test result that wasn’t my baby’s alleged father? How can I be sure that the swabs that were sent for my baby’s alleged father were sent off with mines. I really want these results to be accurate stating he is NOT the father. I’m just paranoid.

    • Hi, LeahMarie. Thanks for testing with us! All samples for a case are linked together with bar codes, so there’s no chance of a mix-up with someone else’s. No worries!

  58. If my child had a DNA test done, and there were 2 alleged fathers who were brothers but only 1 brother was tested and it came back he was her father, would the results be absolutely right or is there still a chance the brother could be her father since he was not tested as well.. ? I know this sounds awful but there is a huge story behind this..

    • Hi, Sami. In cases like this, a false positive may occur. It really depends on how much DNA the brothers happen to have in common at the locations tested. It’s essential that your daughter be tested again, hopefully this time with both men. If that’s not possible, then the lab definitely needs to be made aware of the other alleged father and his biological relationship to the man being tested BEFORE they do the testing.

      • Hi, what about if the results show 0% for one brother? I just received results that my alleged father had a 0% probability and then my mom told me that it could be his brother. Is there some kind of indication in the chart that might show relatedness between brother #1 and me?

        • It would have been handy if your mother had mentioned this before, since the lab would have taken this information into account when performing their analysis. However, this isn’t usually an issue or concern unless the result of the test with the first brother had come out with a positive probability of paternity. Is it possible for the brother to test also?

  59. What is the difference between an inclusion result of >99.9% and 99.99% ?
    I keep seeing people say they got a result of 99.99%, but is that just for the paternity test and not the NIPP?
    I took the NIPP and got a result of >99.9% just curious if I can be assured with that result or if there is a slight chance of error. I’m asking in regards to two men. So hoping that with this inclusion result, I can be confident in the result!
    Thank you

    • Hi, Lucy. You can be absolutely confident in the result. The “>” symbol doesn’t mean anything. Also, there is an infinitesimally small difference between 99.9% and 99.99% probability, and it’s also nothing to worry about. They are both equally conclusive numbers.

  60. Hi, is there any possible way to have a false positive? I am happy with my results as he came back as not excluded but is there anyway way it could be a false positive. My life is literally on the line with this prenatal test. My ultrasound for gender was also accurate with the gender yhu guys gave me so it gives me confidence but still Can I trust my results? Do I have to make a post dna test ? Are my results guaranteed? And yes I did test with you guys ddc. also what does it mean when there is gene mutation causing an inaccurate result?

    • Hi, Mj. You can be absolutely confident in your test results with no post-natal DNA test needed. Any gene mutations are taken into account when a highly-accredited lab like ours does the analysis, so there is no chance that a mutation could cause an inaccurate result.

    • It means that if there is a mismatch between alleged father and child in the data, it could be due to a possible mutation. That possibility was taken into account when calculating the probability of paternity.

  61. This is Venky, My Patternity Test results are :
    The alleged father is not excluded as the biological father of the tested child. Based on testing results obtained from analyses of the DNA loci listed, the probability of paternity is 99.9998%. and Combined Paternity Index: 553,223. Please clarify two things:
    1) Is I am the father of the tested child?
    2) The report shows only 18 markers + 1 Amelogenin. They have ingnored other 2 markers such as D2S1338 and D22S1045. Will the still the report is correct.

    • Hi, Venkat

      (1) Yes, you are considered the biological father of the child tested
      (2) You didn’t mention if you tested with us or elsewhere. But if you used an accredited lab, your report is most likely correct

  62. Hello I asked previously about DNA results between 2 brothers and a child, the results showed the one brother was the childs father but only he was tested not the second brother, my question is on the DNA test thay proved the first brother was the father two columns didn’t match in numbers, the column numbers were mother: 8 child: 8 father: 8,9
    Mother: 11,12 child: 11 father: 11
    How does this work in this case.. im so confused.. please help..

    • One number in a column actually means that allele is duplicated. For example, if a child’s column shows a single 8, then that’s really 8,8. So, in the examples you gave me:

      (1) Mother is 8,8/ child is 8/8, father is 8/9: Child gets one 8 from mom and one 8 from dad
      (2) Mother is 11,12/ child is 11,11/ father is 11/11: Child gets one 11 from mom and one 11 from dad

  63. Can I see the CPI from my test if I did the prenatal paternity test? Probability of Paternity for the man I tested was >99.9%, what is the CPI? Is there a way for me to see my actual results other than just the conclusion?

      • HI DDC,
        Event though the results are conclusive and I am the biological father (tested in DDC).
        Why below 2 markers are ignored or not published in the report. Please advise.
        The report shows only 18 markers + 1 Amelogenin. They have ingnored other 2 markers such as D2S1338 and D22S1045.
        Report states:
        The alleged father is not excluded as the biological father of the tested child.
        the probability of paternity is 99.9998%

  64. Hello ,I just got the results from DDC yesterday regardless to my prenatal paternity test ,the results is what I expected but the only thing who concernes me and doesn’t let me enjoy my pregnancy is that there is no index or chart .I do think if you reached that conclusion you analysed a chart even if that chart includes 2,688 or whatever how many are loci.My question is :is any way I can get in the Posesion of my detailed chart ,I do belive in DDC and in science but some things you wanna see them with your own eyes especially when it comes to such a big life choice as keeping a baby or not .I am looking for your answer and if you don’t want to send me the report because is too long or I won’t be able to understand it ,I do have a doctor who will be able to understand it and I don’t mind reading 2,688 markers when it comes to something that important .Thank you

    • Hi, Alina. We do analyze thousands upon thousands of data-points for absolute accuracy, and we have found in the past that this type of extensive data was overwhelming to most customers and they prefer the simpler report. If you have questions about your results or the data used for the test, you’re welcome to contact our Prenatal Hotline at 800-303-9085. Thanks for testing with us!

  65. Why my comment was deleted ?I asked yesterday if I can have a more detailed report of my test and you said to contact that phone number which I did in the morning.The lady over the phone told me she can’t give me the numbers of my test because there are close to 3000 and I said fine ,I do have a doctor who is specialed in dna who I wanna consult so a doctor will be able to explain to me if DDC doesn’t have time for that .My question is how do I get that results ?I did paid for that test and I guess all the numbers who belong to my case ,I have a right to ask about it .This is my life and my pregnancy and I do have the right to see with my own eyes my data .I would like someone to give me an email adress who I can actually get in touch with a person who sends me the report of my test .Thank you

  66. Hi,
    If a DNA test was done between a minor child(girl) and alleged grandmother(alleged father deceased) and the results came back stating “Using the Bayesian method of calculating probabilities and accepting a prior probability of 0,5, the final probability is that the alleged grandmother is 93,2131% the biological grandmother of the minor child however the figures obtained are relatively low and it is recommended that additional testing of the X chromosome or other family members be done in an attempt to strengthen these findings.”

    Could this results be a conclusion that the alleged grandmother is related to the minor child?

    Thank you

    • Hi, Herbert. These results are certainly supportive of that relationship, but the lab you used was correct in recommending additional testing because this percentage is not conclusive. Adding the mother of the child, for example, would have most likely strengthened these results.

  67. If two brothers are the possible father and only one is tested and that information about possible siblings being the father was not disclosed how accurate is the testing for just that one brother? Both brothers have the same mother and father.

    • Hi, Jae. If the results show 0% probability of paternity, then you can trust that answer. If there was a positive probability of paternity, there is the possibility of having a “false positive.” This is why all accredited labs, including ours, emphasize that this type of information must be disclosed prior to testing.

  68. HI DDC,
    Event though the results are conclusive and I am the biological father (tested in DDC).
    Why below 2 markers are ignored or not published in the report. Please advise.
    The report shows only 18 markers + 1 Amelogenin. They have ingnored other 2 markers such as D2S1338 and D22S1045.
    Report states:
    The alleged father is not excluded as the biological father of the tested child.
    the probability of paternity is 99.9998%

  69. Hi!
    I had a prenatal paternity test done in August. I had slept with two men in the time frame of 7 days. The second man came back with a probability of paternity at 99.9%. Should I have the other tested as well to completely rule the other man out? They are not related. Also, when this testing is performed, do ALL markers have to match up to the alleged potential father or is it just a few based on some sort of formula?
    Thank you so much!

    • Hi, Lisa. You didn’t mention whether you tested with us or not, but I’ll assume you did. A probability of paternity of 99.99% is about the strongest result you can get and, if a legal test is done, would serve as proof of paternity in any court of law. Because a child gets 50% of their DNA from their bio mom and 50% from their bio dad, all markers analyzed must match between the child and possible father, unless there is a mutation at a location. In this case, the frequency of the mutation in the population for the participant’s ethnic group is taken into account and included in the calculation for paternity.

  70. Hi I did a peace of mind at home prenatal paternity test. The swabs were sent to my home, although I did go to a clinic to get blood taken. I got an inclusive result back. Just curious as to how accurate this is even though it wasn’t a “chain of custody test”

  71. I just got my results back but since I had 2 possible fathers tested, in the results it don’t say the names. How would I know witch is who’s ?

  72. Legal chain of custody test performed by another lab indicates 99.99% probability, but the wrong race was used (mother is Chamorro, father is Chamorro but lab used Pacific Islander). Paternity has already been legally established, but everyone will feel better if results can be re-verified. Would it be best to have first lab re-calculate probability with the correct race or have a second test done by another lab, yours for example? 13 markers were compared and all matched. CPI was given as 6,831,963 to 1.

    • Hi, Carol. 13 markers is a very low number to use for a paternity test. The very minimum should be 16…we actually use 20 plus the sex chromosome. Was the lab you used fully accredited? All that being said, the numbers you were given are very conclusive, and it’s hard to say whether or not changing race would make a difference in the conclusion, although it could change the numbers. If it makes you feel better, you could test again with us if they’re unwilling to re-calculate.

  73. I’m so confused with your test cause how can our home dna test with just the alleged father and child come out positive and when they took my dna, child and alleged father dna in a local facility came out negative but when I talked to one of your representative she said that me and the alleged father haves similar dna and have some matches with the child and I so how can it come out negative doesn’t it suppose to be positive?

  74. Chevon, I did an at home peace of mind dna paternity test and it came back to be 99.999998% I was just wondering if this was accurate for the father to be the biological father because I never had to do a dna test so I wanted to know if my test is true of what its saying and a accurate result

    • Hi, Chevon. That is a very high probability of paternity. If you used an accredited lab like ours, you can trust that those results are accurate.

  75. My cousin’s son was lost from birth and wanted to check if the one claiming to be his son is true. It was explained here that a DNA paternity test shows that probability of the relationship. Moreover, it’s recommended to go to trusted businesses for a reliable DNA paternity testing services.

    • Hi, Sariah. Thanks for reaching out to us. Your cousin would need to order a home paternity test for him and the alleged son. If your cousin thinks he might need the results for court (such as if the alleged son wants to claim inheritance rights or have your cousin’s name place on the birth certificate), then he should order a legal paternity test with court-admissible results. Please have him call us at 800-681-7162.

    • Hi, Eric. You access your report via a secure, online account that is created for you when you submit samples and payment. You’ll get email notifications letting you know what to do and when to access your report. Most people download the PDF report and print it out themselves, but if you want results in the mail, you can order a hard copy for a small additional charge. Hope this helps!

  76. I have had 2 government paternity test done for my daughter. On both tests mine and my daughters test numbers are the same but the alleged fathers is different. All the other tests I have seen all the test numbers are the same. Has my test been tampered with?

    • Hi, Brittany. If two different men were tested, then you could expected the alleged fathers to have different DNA profiles. If the same man was tested twice, then it’s time to start asking the court questions.

  77. I did a test through the at home identigene kit, but my results were through you guys. Is it still accurate? I made sure the swabs were correct and my results came back 99.99 possibility of paternity. But I still find myself questioning it

  78. After a paternity test, can the mother object the results on the ground that the child was sick and non cooperative on the day the swabs were taken?

    • Hi, Anita. Sickness and/or being cranky doesn’t change the child’s DNA. If results were issued for the test, then the lab had a viable sample from the child.

    • Our paternity reports don’t have the caret in front of that number, Bryan, and I really can’t peak to the practices of other labs. That being said, you were given a 99.9% probability of paternity, which is just about as strong a result as you can gt.

        • Ah! You didn’t mention it was a prenatal test; now it makes sense. Sorry about that! For your prenatal report, that caret does indeed mean that the probability that you are the biological father is greater than 99.9%, yes. Because several thousand markers are tested for a prenatal (instead of the standard 20 for a postnatal test), the calculation for paternity is done differently. The results do not get more granular beyond tenths. You are a daddy!

  79. What exactly means in the report. “Based on testing results obtained from the analyses of the DNA loci listed, the probability of relatedness is 34.6%” in a test performed between Paternal Grandmother and female grandchild? Thanks

    • It means there is a 34.6% probability that the grandmother and child are biologically related. That is an inconclusive result. Did the mother of the child participate? If not, she should, since that can greatly help to confirm results.

  80. If the baby and the alleged paternal grandfather were tested (the mother nor the paternal grandmother were not tested) and the result came back 0%, is it most likely the alleged father is excluded as the biological father? A grandparent DNA test was not used.

    • Hi, Pat. The test answered one question and one question only: Is the man tested the biological father of the child tested? The answer is 0% probability of paternity, which is what you would expect. It does not mean there is no chance the alleged father is the biological father.

  81. Hi, If i had an alleged father and child tested twice, both tests ran by you guys; why are the Paternity Index (PI) numbers different? Shouldn’t everything be the same since it was the same child and father?????

    • Hi, D. The most common reason for this is that, if the first test is non-chain and a race was not entered, PI numbers are based on “Other.” If the second test was a legal one and a race was entered (say, Black), then that would change the PIs also. Remember that paternity-testing is calculated using statistics.

  82. Donna yes my paternity test came back 99.999998 and I was just wondering is this accurate cause I never had to do this type of testing and yes it was a peace of mind test and I sent in the father and child samples in I just really conserde that r my results accurate they cause most of the numbers are the same they couldn’t use the father samples as child and how would I know if my test was tampered or anything cause I’m conserde bout my results cause my child looks so different

    • I can’t speak for other labs’ processes, but if you tested with us, they didn’t get mixed up with anyone else’s. We have safeguards in place to prevent that. Keep in mind that many children don’t look like their biological fathers, so that shouldn’t be the criteria used to decide whether or not they’re related.

  83. Hi,
    I think my DNA sample was replaced and the result was produced. Can I do my individual DNA and compare to the father column. Or do I need the sample of the child as well.

    • Hi, Newill. If you did an at-home test and you suspect that one of the participants included someone else’s DNA instead of their own, you can do a legal test, wherein DNA collection is witnessed and samples are submitted by an approved impartial party. That way, you can ensure that the right samples are submitted for testing. An additional benefit is that results from a legal test can be used in court.

      • Hi I did it in presence of Cort officer and got it sealed but the part has manged them and replaced the sample or manipulated the report . So I want to do individual DNA test and compare to this report to show Cort there is a fraud in the report. Is it possible to do individual test and compare to the result submitted in Cort

  84. Hi I did it in presence of Cort officer and got it sealed but the part has manged them and replaced the sample or manipulated the report . So I want to do individual DNA test and compare to this report to show Cort there is a fraud in the report. Is it possible to do individual test and compare to the result submitted in Cort

  85. Do you guys guarantee accuracy in the prenatal tests even if the test itself isn’t AABB accredited? I got a >99.9 and am happy with the results, I just need to know if there is any way it could be wrong results? No relatives were involved and I’m not expecting multiples and I did test with ddc. Can my results be guaranteed correct?

    • Hi, Mj. Yes, we guarantee accuracy of our prenatal test. As you mentioned, the test itself isn’t yet AABB-accredited yet, although it’s in the works.

    • Hi, Scott. Really, “close biological relations” in the context of DNA testing refer to 1st- and 2nd-degree relatives.

        Parents
        Children
        Siblings
        Half-Siblings
        Aunt/Uncles
        Grandparents/Grandchildren
        Nieces/Nephews

      “Close relations” in this context would not include great-grandparents, or any cousins.

    • Is an uncle to far removed to cause a false positive on the paternity test? I know a brother can cause a false positive but could an uncle?

  86. After a paternity test came back showing that my daughters father was 99.99% her father and shared 24/24 markers with him, I noticed that the alleged father and I also shared 16/24 markers. Are the alleged father and I related somehow too? Could we he cousins?

    • Hi, Cherie. By virtue of being human beings, it’s not unusual for two unrelated people to share some of the same DNA data. You and I share some of the same data too, probably. It doesn’t mean you’re biologically related.

      • Is it possible for someone at the diagnostics center to put his DNA up against my DNA to see if and how we are related since you already have our individual DNA results in your systems? In other words, if I called and asked and sent a payment in could this test be run without collecting anymore DNA from he or I? The thing is that; our daughter was diagnosed with a genetic disorder in 2014 of a 10p deletion and 12p duplication and on her test results it states “LCSH throughout the genome indicating possible familial relationship between parents”. Her genetic testing was done with blood via microarray. That is two DNA test that suggests that we could be related which freaks me out. Our family trees are a little hard to track previous to the 1920’s (great grandparents/grandparents) because of poor record keeping due to immigration and just flat out that generational time period, so I can not find the missing link on my own.

        • Hi, Cherie. I consulted our team of experts on this. They said you’d both need to submit your DNA again, and then determine what the relationship is that you want to test. Do you suspect you might be half siblings? We could do that. Do you suspect you’re cousins? We cannot test for that. You’re more than welcome to contact us to speak with someone directly, if that’s easier: 800-681-7162.

  87. Donna well I had a test done through identigene but I recieved my results from Fairfield oh ddc way and I was just wondering are u guys with that lab or what cause I recieved my results from them and they came back saying is not excluded but I was just worried cause could anything been wrong with my samples like if I didn’t have enough samples sent for child would they have used the father ones for the child I’m just scared and worried cause I never had to take a paternity test so I’m really worried bout my results please give me some feedback to this

    • Hi, Donna. No worries! HomeDNA Identigene is a DDC brand and has been since DDC acquired it in December, 2016. The DDC lab is located in Fairfield, Ohio.

    • Donna, we have one lab. It’s here in Ohio and your test was performed here. You can trust your results. Thanks for testing with us!

    • Hi, Sar. If the lab determines there aren’t enough samples to conduct testing, we’ll contact the responsible party to arrange for recollection. If you are issued results, then there was enough DNA. No worries!

  88. Sarah, How accurate are homedna paternity test with peace of mind from u guys cause I didn’t one from u guys in September and I’m still trying to figure out if the results I received accurate of what how would I really know if my results are someone esle and maybe sent me the wrong results and they were not mind like a mix up in swabs

    • The process in the lab for an at-home paternity test is exactly the same as it is for a court-ordered test. The DNA is extracted the same way and the analysis is done the same way. We have tight safeguards in place to prevent mix-ups, which is why our lab is so highly accredited. You can be absolutely sure your results are correct for the samples you provided us.

  89. The results I got are confusing me so I’m wondering if I can send them to u and for u to explain to me coz I’m really confused

    • It wouldn’t happen in our lab. But let’s say someone mixes up the sample envelopes at home before sending in their samples. We don’t check for age…just for gender. So even if we test the son as the “father” and the father a the “son,” the results will be the same: they share (or don’t share) a father/son biological relationship.

  90. Sarah, so u think my results I received for my son were accurate even tho it was a piece of mind test cause what would it be if not I received a 99.99998 result I just scared that I got wrong results cause my son has no favor ness but I hope that they wouldn’t send out wrong results in just worried cause this my first time doin this and I brought my test from Walgreen the homedna identigene

  91. Locus Child Father PI
    D8S1179 13,14 11,13 0.75
    D21S11 30,32 29,31 0.0040 *
    D7S820 8,10 10 1.95
    CSF1PO 12,11 12 1.38
    D3S1358 14,15 15,17 0.91
    D13S317 8,13 13,14 2.14
    D16S539 11,13 10,11 0.79
    D2S1338 23,24 19,24 2.17
    D19S433 13 13 3.92
    vWA 16,18 18,19 1.23
    TPOX 8,10 8 0.95
    D18S51 12,16 12,14 2.20
    D5S818 9,14 12,13 0.0024 *
    FGA 21,23 21,22 1.39
    PROBABILITY OF PATERNITY: 0.099% COMBINED PATERNITY INDEX: 0.00099

    So obviously there are the two non matches in the results above. my question would be about the other four that are zero percent. If there is a match for one of the numbers, why are they not comparable with the other numbers of greater than 1.0?

    • Hi, Alex. I asked our Chief Science Officer to look at your data, and this is what he said: “The CPI is inconclusive. There are 2 genetic inconsistencies (exclusions). Each exclusion is a one step exclusion where there is a one number difference between the child and alleged father’s numbers, consistent with a double mutational event. This case needs additional testing to resolve; something we can provide (only 14 loci were examined here and we and test more than 30). It also may require having the mother included in the testing, if possible. Double mutations do occur. We see several double mutational events each month.”

      It looks like further testing would be a good idea, Alex.

  92. The man who could potentially be my father is deceased. I have no contact with his brothers or sister. Would the test still be accurate if I used the DNA from one of his children? If not what is the best way to get an accurate result

  93. Adam I had test done through identigene and it ask to use 4 swabs for each person I’m just wondering if everything was use correct for the results I received

    • Hi, Adam. HomeDNA Identigene is one of our brands, and all testing is performed here at our highly-accredited lab in Cincinnati. Each test is performed twice (by independent teams) to ensure accuracy. You can be sure your results are correct for the samples you submitted to us.

  94. Adam ok thanks I just wasn’t sure so the names that are on ur samples is what the lab uses right cause I want to make sure I had enough swabs in to receive these results

    • Hello, Dee. We cannot locate any test in our system that matches the email address you provided for this comment, and we cannot publish that comment unless we can locate the cases in question. That way, we can address your concerns properly. You’re welcome to call us at 800-831-1906 if that’s easier for you.

  95. Me (Husband), my wife and my child got tested Paternity Test with 24 Markers. All the Markers are exactly matching.
    The result is ‘Can not be exclude as Biological Father’ with Paternity Index : 99.99999999% & combined Paternity Index : 38,164,564,715.
    There was another Alleged Father who is not tested but we both are no way related to each other. He is not agreeing to give his mouth swab for test.
    I am bit worried about my test results. are my test results are okay without his test results as we both are no way related to each other?
    My heart is pumping like anything and bit nervous and anxiety.Please help.

    • I cannot comment on your question here, since we only have a record of one test you did with us. Instead of going back and forth here publicly (where I can’t get into specifics with you due to HIPAA), I suggest you call and speak with one of our experts confidentially.

  96. Chevon, I did speak with a representative yesterday and she did tell me that my results were good for the samples I sent in I am just worried that they won’t cause like I said the test came back not excluded with a percentage of 99.999998 and I’m just worried that it was done wrong or I didn’t receive the right results or they got mixed up with somebody esles or I didn’t send enough swabs for my child I’m worried cause never had to do this actual test before so just please tell me if it accurate and correct cause don’t want him raising a child that’s not his. Thanks

    • Chevon, each test is performed twice by independent teams in order to ensure accuracy. Each set of samples is tracked via bar code through every step in the process, so there aren’t any mix-ups. We wouldn’t hold the highest levels of accreditation in the industry unless we had all kinds of safeguards like these in place to protect the customer and the integrity of the test. Our lab is the trusted provider of paternity testing for courts all across the country and around the world. You can trust your results are accurate.

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