One twin, the 'donor' twin, is small and anemic, the other, the 'recipient' twin, is large and polycythemic. The lives of both twins are endangered by this condition.

There are different types of twins, identical and fraternal being the most common. Identical, or monozygotic, twins develop from the same fertilized egg that splits into two. These twins are...

The meaning of TWIN is either of two offspring produced in the same pregnancy. How to use twin in a sentence.

Jan 2, 2026 · Twin, either of two young who are simultaneously born from one mother. Twinning, common in many animals, is of two biological kinds: the one-egg (monozygotic), or identical, type …

The Official Site of Major League Baseball

There are two main types of twins. One is identical twins, like Jennah and Sana, and the other is fraternal twins. Let’s learn more about each type. Identical twins develop from a single fertilized egg. …

Apr 25, 2023 · In a basic twin pregnancy, two embryos go their separate ways and develop into twin babies, whether identical or fraternal. Some unique sets of twins follow a different path.