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.

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

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.

Oct 8, 2025 · 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, …

Mar 15, 2023 · Fraternal and identical are the most common types of twins. Other types include conjoined twins, half-identical twins and others.

Twin definition: either of two children or animals brought forth at a birth.. See examples of TWIN used 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.

Apr 28, 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 …

The special relationship between twins allows researchers to examine the differences between genetic and environmental influences over both physical and mental health, as well as traits …

Sep 23, 2024 · Do twins run in families? Find out what you need to know about how hereditary twins are.