Austrian researchers reveal why snow monkeys don't suffer maternal deaths during childbirth, offering insights into safer ...

Because the head is the largest and least flexible part of the baby, it's best for it to lead the way into the birth canal. That way there's little risk the body will make it through but the baby ...

Solomon: With more C-sections, that could lead to larger heads in our descendants because they wouldn't be constrained by the size of the birth canal. Narrator: And down the road, larger heads ...

An examination of ancient and modern skeletal samples gathered from around the world reveals that the shape and size of the female birth canal varies widely among different human populations. These ...