A paternity test without the mother

Can I do a paternity test without the mother?

DDC always recommends that the mother contribute her DNA sample to a paternity test. However, although her participation is recommended, it’s not required. If you are trying to decide whether or not mom should be part of testing, here are some sample scenarios that can help you make the best choice for your unique situation.

A Mother’s Participation can Help Strengthen Paternity Results

In the majority of cases, a paternity question can be answered with only the possible father’s DNA and the child’s But in some relatively rare instances, the mother’s DNA can help strengthen results.

Example 1:

A child gets 50% of their DNA from the biological mother and 50% from the biological father. Therefore, the child must match both parents at every single DNA marker. If the man being tested has only one mismatch with the child, it may be due to a natural mutation and may not necessarily mean he’s not the biological father. When the mother’s DNA is included in the test, this question can be resolved and conclusive results given.

Example 2:

If there are two possible fathers for a child and those fathers are biologically related (brothers, father/son, etc.), then it’s essential to include the mother’s DNA sample in order to strengthen results.

A Mother Who Participates Gets Guaranteed Access to Results

As a top DNA lab maintaining the highest levels of accreditation, DDC maintains a strict policy of confidentiality. Results can only be released to participants in the test, to their legal representatives (such as lawyers), or to the tested child’s legal guardian, if that child is a minor. Therefore, to guarantee quick access to test results, it’s a great idea for the mother to just submit her DNA too, even if it ends up not being needed to strengthen results.

If You’re Doing a Legal, Chain-of-Custody Paternity Test

In many cases, courts who order a paternity test require the mother to participate. Court-ordered tests are also called legal or chain-of-custody tests, wherein DNA collection and sample-submission to the lab are supervised by an approved witness.

 If the court requires the mother to participate in testing, then the test cannot be performed without her.

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


    • Hi, Inetta. At-home test results are kept on file for one (1) year, and legal tests are kept on file for seven (7); so unfortunately we can’t help you because your test was performed 15 years ago.

  1. Hello, My wife of 32 years recently had a nightmare where our infant son (now 24 yoa) was switched at a day care center for another child. Her insecurity was such she began to believe this to be true, in spite of there being no reason to doubt he is our child. Three months ago I sent my son’s and my samples to you and the result was as I predicted , with a 99.99997% probability of paternity, CPI of 4,107,875. That placated her for a while, but she recently saw a ten year old blog post from some geneticist at Stanford, who claimed he heard of a similar father / son test that was overturned with the inclusion of the mother. Her question is addressed by your claim ” A “motherless” test could require more extensive analysis to produce conclusive results, but the results are just as accurate as those of a standard paternity test.”, yet she needs a more definitive answer. Is it worth repeating the test with her included? Will it materially alter the confidence of your results? Can I just send her swabs in if we decide to go that route? Respond via email if possible? Thanks.

Leave a Reply

Your email address will not be published. Required fields are marked *

clear formPost comment