We have all seen twins, some of us even have one! While whenever the word "twins" come to our mind, we think of fraternal or identical pairs. But did you know that there are many other types and ...

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 ...

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 ...

There is no one or definite answer to the most-asked question by adult twins, “Can we ever get along?” Because there are so many different types of twin estrangement problems and so little information ...

One of the first things pregnant people wonder is whether or not they'll have twins. According to the Centers for Disease Control and Prevention (CDC), the likelihood of a pregnant person having twins ...