Human birth has a reputation for danger. The usual explanation is simple enough: walking upright narrowed the pelvis, while ...

Childbirth is often described as one of humanity’s defining biological challenges, but new research suggests the story is far ...

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For centuries, childbirth’s pain was explained as punishment; more recently, as the evolutionary price of walking upright and ...

3D simulation of the birth canal of chimpanzees with (B) the fetal head in a fully extended position, the typical head alignment in apes, and (C) the fetal head in a fully flexed position, the usual ...

Human childbirth is commonly viewed as uniquely difficult and dangerous. The reason: the combination of bipedalism and large brains creates a tight fit between the baby and the birth canal. Research ...

According to a new study, chimpanzees, like humans, must contend with a confined bony birth canal when giving birth. In humans, the problem was exacerbated by our unique form of upright walking since ...