On Valentine’s Day, a woman in Texas gave birth to two sets of identical twins. While 3 out of every 1000 births involve identical twins, the odds of delivering two sets of naturally occurring identical twins (that is, without the use of fertility treatments) is about 1 in 70 million.
Doctors can usually diagnose a twin pregnancy by examining the placenta. In this case, each pair of twins shared a placenta. However, in some cases, identical twins cannot be distinguished from fraternal twins using the placenta alone (see dichorionic diamniotic twins). Parents of twins can request a twin DNA test to determine if the twins are identical or fraternal.
A twin DNA test, also known as a twin zygosity test, compares the DNA of each sibling. Identical twins will have exactly the same DNA profile, and fraternal twins will not. In many cases, parents who request this test have doubts about what they’ve been told at birth as their kids grew up and exhibited identical/nonidentical features. Some parents also were simply not told by their doctor about their twins’ zygosity, or have no access to medical records (for example, if the twins were adopted).
Determining twin zygosity is an important component of a child’s medical history, since the predisposition to genetic diseases will be shared by both twins.
Visit our twin zygosity testing page for more information, or call 1-800-613-5768.
Eric Brunner Exonerated Based on Key DNA Evidence Provided by DNA Diagnostics Center (DDC) in Partnership with the Ohio Innocence Project
FAIRFIELD, Ohio, Nov. 23, 2022 /PRNewswire/ — DNA Diagnostics Center, Inc. (“DDC”), part of the global network of Eurofins companies, announces that Eric Brunner, a Canton, OH man who was convicted of rape and attempted rape of two women in 1996, has been exonerated based on key DNA analysis performed by DDC’s Forensics Department in conjunction with the Ohio Innocence Project (OIP). Mr. Brunner served 13 years in prison before he was released on parole in 2009.