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 ...

When our identical twin boys were born, we deliberately treated them as individuals. Even their closest friends struggled to tell them apart despite our efforts to differentiate them. The twins ...

I was known for being an identical twin, and that shaped my identity. We lived in a small town in Iowa, and no one could tell us apart. My husband's best friend is a triplet, so he understood that my ...

It remains a mystery as to why there are vast differences in twin birth rates among the different regions of the developing world. Past research suggests that identical twins occur at a relatively ...

A set of identical twins is 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, 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 ...