Want to know conclusively if your twins are identical or fraternal? Try twin DNA testing, also known as “twin zygosity” testing.
Testing is quite simple and painless. With a swab or brush provided with the testing kit, you simply scrape the inside of your twins’ mouths to collect cheek cells. The cells are then sent to the laboratory and tested for genetic similarities.
I recommend the following laboratories for their excellent customer service and prompt testing response time:
Affiliated Genetics at www.affiliatedgenetics.com.
DNA Solutions at www.dnasolutions.com.