Twin testing is mainly done for curiosity purposes. Parents of twins—or the twins themselves—sometimes want to confirm whether they are identical or fraternal. Twin DNA analysis can also be important for medical reasons, such as organ donations and blood transfusions. Identical twins are far more compatible as organ donors and always share the same blood type, making them suitable blood donors for each other.

Collecting your DNA sample using the mouth swabs we provide is simple and painless. Samples are collected using our easy-to-use DNA testing kit.

A DNA twin zygosity test costs $189 for testing two siblings, with an additional cost of $100 per person for each additional sibling tested. Results are normally available within 5–7 business days.

Our twin test is based on the analysis of 21 different genetic markers, offering a minimum probability in excess of 99.99%.

Note: We can only guarantee standard result turnaround time when testing takes place solely using oral swab samples. Using a discreet sample for your test may lead to an increase in turnaround time.