Are my kids fraternal twins?

However, having the gene for hyperovulation does not increase a man's chances of fathering fraternal twins. A man carries the gene, but it doesn't change the ovulation pattern of the mother of his children. She has her own genes governing her ovulation. read more

Because fraternal, or dizygotic, twins are 2 separate fertilized eggs, they usually develop 2 separate amniotic sacs, placentas, and supporting structures. Identical, or monozygotic, twins may or may not share the same amniotic sac, depending on how early the single fertilized egg divides into 2. read more

Fraternal twins are siblings born at the same time. The term twins in the case of fraternal twins refers only to their birth at the same time with one shared pregnancy. Identical twins would have identical genomes. Children with identical genomes born separately would be clones. read more

With twins, a common question parents have is whether the twins are identical or fraternal. DNA Diagnostics Center offers a twin zygosity DNA test that definitively determines whether twins are identical or fraternal. A twin zygosity DNA test is a simple procedure performed sometime after the babies are born. read more