Twins have been rare in human history and for that reason can seem special. Many cultures associate twins with health and ...

Twins are pretty rare, accounting for just 3% of births in the U.S. these days. But new research shows that for primates 60 million years ago, giving birth to twins was the norm. When you purchase ...

Twins have been rare in human history and for that reason can seem special. Many cultures associate twins with health and vitality, while others see them as a philosophical reminder of the duality of ...

When Taylor Deal gave birth to her twin daughters, she noticed right away that something was up. Before giving birth, Deal, whose a twin herself, was shocked that she was even having twins in the ...

Amber McCullough gave birth to conjoined twin girls. Amber McCullough is pictured during an interview with Colorado's KUSA-TV, a day before she was to give birth to conjoined twins in Aurora, Colo.

Amid a sharp increase in twin (multiple-fetus) pregnancies and births in South Korea, there have been calls for policy shifts to reduce the risks associated with twin births for mothers and fetuses.

Twins, triplets, and other multiples have long caught the attention of “singletons,” or those of us born without a built-in best friend by our sides. Twins—and the media—annually descend on Twinsburg, ...

Twins, triplets, and other multiples have long caught the attention of "singletons," or those of us born without a built-in best friend by our sides. Twins—and the media—annually descend on Twinsburg, ...