Determine whether twins are identical (monozygotic) or fraternal (dizygotic) with our twin zygosity DNA test. This test compares the DNA profiles of both twins to definitively establish whether they developed from a single fertilized egg or two separate eggs.
99.99%+
Accuracy
2-3 Days
Results
24+
Markers Tested
Participants Included
2Lab Processing Speed
Processing time begins once samples arrive at our lab. Choose Express Shipping at checkout for fastest delivery.
Results in 2-3 business days.
Prepaid Return Shipping | Ships Same Day (Order by 2 PM EST)
Determine whether twins are identical (monozygotic) or fraternal (dizygotic) with our twin zygosity DNA test. This test compares the DNA profiles of both twins to definitively establish whether they developed from a single fertilized egg or two separate eggs.
Each twin provides a painless cheek swab sample at home. Our state-of-the-art laboratory compares the DNA profiles across up to 28 genetic markers. Identical twins share 100% of their DNA, while fraternal twins share approximately 50%, similar to regular siblings. Results are delivered within 2-3 business days through our secure online portal.
This test provides 99.9%+ accuracy in determining twin zygosity.
A twin zygosity test determines whether twins are identical (monozygotic, from one egg) or fraternal (dizygotic, from two eggs). The test compares DNA profiles of both twins to see if they match at every genetic marker tested.
Knowing your zygosity is important for medical reasons (identical twins can be organ donors for each other), understanding genetic health risks, fertility treatment records, and personal curiosity. If one identical twin is diagnosed with a genetic condition, the other twin may carry the same risk.
Twin zygosity testing can be performed at any age, from newborns to adults. The cheek swab collection is painless and safe for all ages.
Related tests: Paternity Test | Sibling DNA Test
Learn more: Do Identical Twins Have the Same DNA? | How DNA Testing Works
Place your order online and receive your DNA collection kit within 3-5 business days via standard shipping, or 2-3 days with express shipping.
Follow the simple instructions to collect painless cheek swab samples from each participant. The process takes under 60 seconds per person.
Use the included pre-paid return shipping label to send your samples to our state-of-the-art laboratory.
Access your confidential results through our secure online portal. Results are typically available within 2-3 business days.
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US Diagnostics Center
333 Conover Dr., STE C
Franklin, Ohio 45005
Phone: (937) 790-9991
Email: support@usdctest.com
