This is true of dogs and other animals too, being born in their amniotic sac.
I also forgot to mention that human babies are technically far more premature than many species when they are born. A baby giraffe will fall ten feet and then be up on its feet in short time and running around. This is like giving birth to a two year old. With our big heads, women would need to be much larger in their pelvis size. Instead of women getting larger pelvises, our development in utero was shortened. We could continue to evolve in head size with cesarians like how bulldogs need to be born via cesarian, but it would be easier to be done in an artificial womb. We could be cone heads. We are from France.