If you give birth to boy and girl twins you’ll be told that they are fraternal and stem from two different eggs. But in extremely rare cases they can in fact...

How Are Twins Formed?

If you're pregnant with twins it might come in handy to know how twins are formed. This way you'll know whether your twin babies are fraternal or identical.

There are probably more types of twins than you think. Get an overview and learn how to distinguish.

Parents are sometimes misinformed during prenatal tests. Use the twin test below and learn the zygosity of your twins. Find out for free whether your twins...