ABC news-foetus in fetu comes about when very early in the twin pregnancy, one foetus wraps around and invelop the other. the dominate foetus then grows and the foetus that would have been his twin lives on inside during the pregnancy; fedding off his host like a parasite. Usualy both twins die before birth. but sometime the host twin survive.
Tags: abc, news, medical, mysteries, foetus, in, fetu, twin, pregnancy, markussio
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