"Irish twins" is an outdated and potentially offensive term for siblings born within 12 months of each other. Very close birth spacing can bring unique parenting challenges and health risks, so ...

New reproductive technologies have yielded a vast array of novel variations on the two conventional twin types—identical and fraternal—as well as some curious twin-like sibships. When a Canadian ...

There’s something fascinating about twins. The idea of two babies growing together often captures people’s curiosity. Many couples even wonder if there’s a way to plan or boost their chances of having ...

Although there are some rare exceptions, identical twins are almost always the same sex. Because identical twins occur when a single fertilized egg splits and forms two embryos, each embryo has the ...

Carrying a twin pregnancy is not an uncommon event. It occurs when the uterus carries two fetuses simultaneously rather than one. Having twins runs in some families and age also appears to be a ...

New reproductive technologies have yielded a vast array of novel variations on the two conventional twin types—identical and fraternal—as well as some curious twin-like sibships. When a Canadian ...

Driven by curiosity, Diana and Martin Williams subjected their twin 3-year-old girls to a DNA experiment. Dressed in little pink coats, with white ribbons tied neatly in their curly hair, Alexa and ...

Twins share a special bond, look alike, and sometimes even seem to finish each other's sentences. Twins share a special bond, look alike, and sometimes even seem to finish each other's sentences. But ...

It's a frequent misconception that identical twins share fingerprints. Each twin has a unique set of fingerprints that convey a different tale, despite the fact that they may appear remarkably alike ...