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 ...

Learn how 3D models of primate birth canals found that squirrel monkeys, bushbabies, and other small species may face a ...

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 ...

Human birth is far more challenging than that of other primates. In 1960, anthropologist Sherwood Washburn proposed a widely accepted explanation for the tight squeeze a baby experiences passing ...

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 ...

Across the mammal family tree, difficult labor appears far more common than many people have assumed, turning up not just in livestock and pets, but in wild deer, seals, whales, primates, and ...

Instead, some small-bodied primate babies have heads almost twice as large as their mothers’ pelvic space, a new study led by ...

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 ...