Howard Burack always knew he was adopted, but he never knew he had a twin. Editor’s note: After our original “20/20” report aired on March 9, 2018, the Jewish Board sent written apologies to the twins ...

When twins are expected, people tend to notice differences in their growth, particularly in their birth weights. Although it may be a worrying thought, different birth weights in twins are really ...

From old movies like The Parent Trap and Twins to The Wonder Twins comics and famous look-alikes, the Olsen Twins, people have always had a bit of a fascination with twins and triplets. But with ...

Ascension Saint Thomas Midtown has specialized care that helped protect preterm twins, Jordyn and Jasmyn White.

We don't know whether your genes contribute to your chances of having twins. It's possible, but it hasn't been proven. One ...