For decades, one idea has shaped discussions about human evolution and birth: humans endure unusually difficult childbirth ...

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 ...

The tight fit of a baby's head through a mother's birth canal, which causes great difficulty in childbirth, is not unique to ...

The tight fit of a baby's head through a mother's birth canal, which causes great difficulty in childbirth, is not unique to humans, as previously understood. Instead, some small-bodied primate babies ...

For centuries, childbirth’s pain was explained as punishment; more recently, as the evolutionary price of walking upright and bearing large-brained babies. But if difficult birth occurs across ...

The broader message is unsettling and clarifying at once. Human childbirth is risky, but it may not be uniquely risky. Instead, the research suggests that difficult birth is part of a wider mammalian ...

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 ...