It’s sometimes referred to as the “birth canal” because babies may pass through the vagina during birth. However, the vagina plays many other important roles in sexual health. It's where ...

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 ...

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 ...