What are the major differences between the male pelvis and female pelvis that permit childbirth in females?

Even though you have many differences between male and female pubic structures both bone and muscle, you can tell three main differences between male and female pelvis.

First, it's inner contour. In males are more heart shape and in females, it is more oval.

Its bones are light and thinner in females, and its subpubic angle is wider in females.

"a.) well–developed vascular system."

i believe your answer would be c.. : )