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BookmarkThe term twin most notably refers to two individuals (or one of two individuals) who have shared the same uterus (womb) and are usually, but not necessarily, born on the same day.
Twins can be fraternal or identical..
For more information about the topic Twin, read the full article at Wikipedia.org, or see the following related articles:
Multiple birth — Twins, triplets and other multiple births occur with to varying degrees in most animal species. The most common form of human multiple birth is twins ... > read more
Conjoined twins — Conjoined twins are twins whose bodies are joined together at birth. This happens where the zygote of identical twins fails to completely separate. ... > read more
Breech birth — A breech birth (also known as breech presentation) refers to the position of the baby in the uterus such that it will be delivered buttocks first as ... > read more
Heritability — In genetics, heritability is the proportion of phenotypic variation in a population that is due to genetic variation. Variation among individuals may ... > read moreNote: This page refers to an article that is licensed under the GNU Free Documentation License. It uses material from the article Twin at Wikipedia.org. See the Wikipedia copyright page for more details.
