Determine if twins are identical or fraternal with our accurate DNA testing service.
Twin DNA testing determines whether twins are identical (monozygotic) or fraternal (dizygotic). While some differences can be observed physically, only DNA analysis can confirm their genetic status with certainty.
Identical twins share 100% of their DNA, while fraternal twins share about 50%—similar to any other siblings. Knowing this can be medically important, especially when it comes to organ donation, inherited conditions, and understanding genetic traits.
Twin DNA testing is quick, painless, and highly accurate. Whether for health, personal curiosity, or medical decision-making, it offers valuable insight and peace of mind.
Definitive results for twin zygosity testing.
Completely confidential results.
Results in 7-10 business days.
Simple, accurate testing to determine if twins are identical (monozygotic) or fraternal (dizygotic).
Order your twin DNA test kit online.
Collect sample with easy swab collection kit or inform us we will arrange professional to collect sample at your location.
Mail samples using prepaid envelope.
Receive conclusive zygosity results.
Common questions about twin DNA testing
Twin DNA testing is 99.99% accurate in determining whether twins are identical or fraternal. Identical twins will show completely matching DNA profiles, while fraternal twins will share about 50% of their DNA like regular siblings.
Yes, but twins of different genders are automatically fraternal (dizygotic), as identical twins must be the same gender. The test can still be performed to confirm their fraternal status and provide a detailed DNA comparison.
Legal twin DNA tests are often used for court cases involving child support, custody, or inheritance disputes. They may also be required for certain insurance purposes or academic studies where proof of twin status is needed.
Get definitive answers about your twins' biological relationship with our accurate DNA testing.
