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Twin DNA Testing

Transmetron provides professional twin zygote DNA testing.

Twin DNA Testing

Are they identical or fraternal?

Identical twins form from a single fertilized egg that splits into two genetically identical parts. Fraternal twins, on the other hand, originate as two separate eggs that are fertilized and implant in the uterus.

As with all DNA Testing done by Transmetron, the simple buccal swab testing method is used.

Why test for DNA twin zygosity at Transmetron?

  • Satisfy parental curiosity
  • Verify sibling's eligibility as an organ/tissue donor
  • Satisfy legal requirements

A twin zygosity test is a DNA test that definitively shows whether twins are identical or fraternal. When twins are born, the physician usually is able to tell whether they are identical or fraternal by examining the placenta. However, sometimes records can be lost, the placenta might have been discarded or damaged before twin zygosity was determined, or doubt may arise because of the twins’ physical characteristics. In such cases, only a DNA test can reveal the truth. A twin zygosity test compares the twins’ DNA profiles to see whether they match—an exact match proves the twins are identical.

In addition, we also offer the following DNA Testing Services to individuals:


Contact your local Transmetron DNA testing lab for more information.