Twins are often called “identical” but that is not true. Identical twins share the same genes, but they are not exact copies of each other. Up to now, there was no accurate way to tell who is among genetically identical twins. But now, some scientists believe they have found a way.

A DNA test called a Twin Zygosity DNA test will help to determine whether or not two people are identical or fraternal twins. The test can be used for any type of twin pair including monozygotic (MZ) and dizygotic (DZ). It also works on triplets, quadruplets, quintuplets, sextuplets, etc. This test has been around since 2005. The test uses genetic markers in order to identify which person is which.

What’s the difference between fraternal twins and identical twins?

Identical Twins: Identical twins share 100% of their genes with each other. They were born from one fertilized egg that split into 2 separate cells during conception.

Fraternal Twins: Fraternal twins do not share all of their genes with each other. Each twin shares 50% of its DNA with the other twin. Both are genetically different but they may look alike because they have a similar environment growing up together.

How much does a Twin Zygosity DNA test?

Pricing for a twin DNA test starts at $279.99 and up.

How long will it take for me to receive my Twin DNA testing results?

The average turnaround time for results to be completed is 1 to 3 business days.

Can twins have two different fathers?

Yes! It’s possible to have 2 dads and still be able to tell who your biological father is. If the mother of the twins slept with two different men in days of each other. The sperm of each man can fertilize two separate eggs. The name of this process is called Superfecundation.

What is the rarest type of twins?

Monoamniotic-monochorionic Twins (MMC) are considered the rarest type of twins. These twins develop in 1 sac, so there is only 1 placenta for both babies. This means that these twins will be very close in size at birth. The chances of this happening are about 1/2000 births.