A labor and delivery nurse shares how her twin daughter's jaw healed due to in-utero pressure from her sister Taylor Deal was ...

This condition has also been known as "Siamese twins," now considered an inappropriate, outdated term.The exact occurrence of ...

Identical twins are not as identical as previously assumed, according to a study published today (January 7) in Nature Genetics. Rather than having exactly the same DNA sequences, twins start ...

All of which makes them valuable to study. Twins share everything from their in-utero environment and parents to birthdate and the classroom setting. One unusual case study involved two-and-a-half ...

The authors suggested that the mutation might have arisen in one twin and was passed to the other in the womb through a shared placenta.

Tess delivered at full term on Nov. 8, giving birth to a healthy baby boy. One shunt came out during delivery, and the other ...

Nneka explained that after trying to get pregnant for two years, including three rounds of in vitro fertilization (IVF), she learned she was having twins. The Bravo star had two embryos ...

A labor and delivery nurse shares how her twin daughter's jaw healed due to in-utero pressure from her sister Ashley Vega is a writer-reporter at PEOPLE. She has been working at PEOPLE since 2024.