DNA Twin Test Kit

Original price was: $271.00.Current price is: $149.00.

Our at-home DNA Twin Test Kit conclusively determines if twins are identical (monozygotic) or fraternal (dizygotic). This easy-to-use DNA test kit offers families a definitive answer to understand their twins’ zygosity without leaving the comfort of home.

  • Conclusively determines twin zygosity.
  • Secure online results in 1-2 business days.
  • Painless, non-invasive & suitable for all ages.


The DNA Family Check Twin Test conclusively determines if twins are identical (monozygotic) or fraternal (dizygotic). Appearance alone can be misleading when identifying twin zygosity. Identical twins may look different, while fraternal twins can appear very similar.

At birth, doctors try to determine if twins are identical or fraternal by examining if they share a placenta and sac. However, this method is only accurate about 75% of the time. Identical twins can develop in separate sacs, and fraternal twins’ placentas can fuse, appearing to be one.

The only definitive way to establish zygosity is through DNA testing. Our simple cheek swab allows easy, painless at-home sample collection from infants to adults. Simply return your samples to our accredited laboratory using the provided prepaid shipping label, then securely access your results online within 1-2 business days.

How it works




Identical twins occur when one fertilized egg splits into two, resulting in two embryos. They share 100% of their DNA because they originate from the same egg and sperm. Fraternal twins, on the other hand, are born when two separate eggs are fertilized by two different sperm, resulting in two separate embryos. Like typical siblings, fraternal twins share about 50% of their DNA.

The DNA Twin Test is 100% accurate in determining zygosity. Our accredited laboratory conducts each test twice to ensure total accuracy.

Once the samples arrive at our state-of-the-art laboratory, your results will be ready in just 1-2 business days. You can easily keep track of your test status within your secure online portal, and we’ll notify you the moment your results are available.

Results are presented in a clear and simple format. On the second page of the report, you’ll find a clear statement indicating if the twins are ‘IDENTICAL’ or ‘FRATERNAL’. You can also compare the DNA profiles provided in the report for confirmation.

Yes, the test can be used to determine the zygosity of multiple births including triplets and quadruplets.

Yes. We respect your privacy and handle all information and samples with utmost confidentiality. All test kits ship out discreetly in an unmarked package. Your results are only accessible to you via secure online access, and we do not share or sell your data to any third party.

Yes, individuals residing at different addresses or even different countries can be tested. We can split the kit, sending each component to the specified locations. Each person can then collect their own samples and send them back to our laboratory for analysis. Our lab will match the samples using the unique identification numbers provided in each kit. To arrange a split kit, include the full names and mailing addresses of each person in the comments box of the online order form. Alternatively, you can contact our customer support team who will assist you in setting up the split kit.

Physical appearance can sometimes provide clues about whether twins are identical (monozygotic) or fraternal (dizygotic). Identical twins often look very similar, with the same hair color, eye color, and general features, because they share 100% of their DNA. Fraternal twins can look similar, like any siblings might, but can also have significant differences in appearance because they share only about 50% of their DNA.

However, relying solely on physical appearance can be misleading. Identical twins might not look exactly alike due to environmental factors, and fraternal twins might look very similar, leading to confusion. In addition, as twins age, their appearances can change, making it even harder to determine zygosity based on looks alone.

The most reliable method to determine whether twins are identical or fraternal is a DNA test, like the DNA Family Check Home Twin Test. It provides conclusive results, regardless of the twins’ physical similarities or differences.

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Online Status Check
Track your test status, available online 24/7


“My ex-girlfriend contacted me to say that I may be the father of her 5 year old daughter. Your test proved that I am the true biological father. It’s a life changer. Thank you.”

Jared, SD

“I was very impressed with the ease and discretion of the testing process. I received my results quickly and quietly.”


“My husband has always mentioned that our two children maybe did not belong to him and accused me of being involved with his friend at the time that our children were conceived. I knew that this was not true. We finally decided to get a paternity test done to put an end to this. Sure enough, the results of the paternity test indicated greater than 99.9999% that he was the father of our children. Our family is now closer than ever before.”

R. Stern, Seattle, WA

“A++++. Near the date that my test was scheduled to be completed, I was so nervous that I ended up calling your lab almost once every hour. Thank you for putting up with me. I won’t forget your kindness.”

G. Lopez, NY, NY

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Need Help?

Let our team of Dedicated Technical Support Experts help you place an order or find the right test for you!

Call us anytime at 1-877-766-2155 or email us at Laboratory hours are 8AM to 5PM pacific time, 11AM to 8PM eastern time, Monday to Friday (except holidays).

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