Identical, or monozygotic, twins develop from the same fertilized egg that splits into two. These twins are the same sex and share the same genes. Sometimes called paternal twins, identical twins ...

A set of identical twins are thriving after life-saving surgery was performed on them while they were still in the womb. Jessica Proudfoot, 29, was 20 weeks pregnant when she discovered that her twins ...

Identical twins from Las Vegas just got a lot closer in Los Angeles. The 56-year-old sisters, Linda Thomas and Karen Rodman, were “feeling well and gratefully celebrating the holiday with their ...

From Romulus and Remus—the myth of the twin brothers who founded the city of Rome—to the synchronized speech of Australia's "Twinnies" Paula and Brigette Powers, identical siblings have long inspired ...