i need this for science.
Conjoined twins are very twinshttp://en.wikipedia.org/wiki/Twin#Identi... whose bodies are joined contained by utero. It is a rare phenomenon; it is estimated to span from 1 in 50,000 births to 1 within 200,000 births, with a somewhat complex incidence in Southwest Asia and Africa. [1] Approximately partly are stillborn, and a smaller fraction of pairs born alive have abnormality incompatible with enthusiasm. The overall survival rate for conjoined twins is approximately 25%. About 70% to 75% of conjoined twin pairs are female. There are several different types of conjoined twins.
They materialize when a fertilized egg that is splitting into similar twins, stops splitting and the fetuses form joined together.
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