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.

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

Dec 13, 2025 · Identical twins, also known as monozygotic twins, share the same egg at conception and are always either both boys or both girls. Fraternal twins, also known as dizygotic twins, come from …

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...

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.

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

Apr 21, 2025 · Twins are classified based on how they originate during early development. The two major categories are monozygotic (identical) and dizygotic (fraternal) twins. Identical twins develop …

Mar 15, 2023 · We talked with Ob/Gyn Julian Peskin, MD (who is a twin himself), about common types of twins, rare types of twins and everything else you’ve been wondering about twinning.

1. Being two or one of two offspring born at the same birth: twin sisters. 2. Being two or one of two identical or similar people, animals, or things: twin cities; a twin bed. 3. Botany Of or relating to …