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.

Jan 31, 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, …

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

TWIN meaning: 1. either of two children born to the same mother on the same occasion: 2. one of two very similar…. Learn more.

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...

Feb 10, 2026 · twin (plural twins) Either of two people (or, less commonly, animals) who shared the same uterus at the same time; one who was born at the same birth as a sibling.

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.