Did you know there are more types of twin than just identical or fraternal? There are actually 6 types of twins that are extremely rare, and can teach us a lot more about the science of human ...

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 ...

"Irish twins" is an outdated and potentially offensive term for siblings born within 12 months of each other.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 ...

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 ...

There are many parents would love to conceive twins. Isn’t it just adorable to have two little people who look exactly the same? There are two types of twins, identical and fraternal twins. Identical ...

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 ...