Identical twins share the same gender—boy-boy, girl-girl. Boy-girl twins are always fraternal. A boy-girl pair may be identical with a rare genetic mutation, but this brother and sister are like ...

After which the embryos develop into a boy-girl pair. Although rare, there are cases where a set of identical twins marries another set of identical twins, called the quaternary union. One such ...

As with naming any child, there's no perfect way to name twin girls. If you're not sure where to start, think about the types of names you're drawn to, what kind of style they are (i.e., vintage ...

Fans recall Kiara's wish for a boy and a girl, speculating about twins. The couple ... on Instagram with a collaborative post featuring a pair of tiny knitted booties held in their hands.