Do Twins Always Have The Same Father?

Category: Twin Zygosity DNA Testing

The answer may surprise you! While identical twins always have the same biological father, fraternal twins can have different fathers. This can happen if a woman has sexual intercourse with two different men around the same time when both embryos are conceived. While it is not common, we have seen this happen several times over the years.

This means in rare circumstances that the twins are also half-siblings!