Human birth has a reputation for danger. The usual explanation is simple enough: walking upright narrowed the pelvis, while evolution also favored babies with large ...
Add Yahoo as a preferred source to see more of our stories on Google. Human childbirth may not be unique, a new review finds similar birth risks across many mammals. (CREDIT: Shutterstock) Human birth ...
Human babies have large heads, and the shape of the human birth canal remains distinctive. The fetus usually has to rotate through the canal in a way that has not been documented in other mammals.
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