Crazy question I know. I was wondering why many mammals can voluntarily expel their placenta, but humans can’t. One example is deer do this when they are in danger and need to skedaddle. Why can’t we do that?
In: Biology
We wouldn’t be able to skedaddle anyway because of the anatomy of the vagina and pelvis due to our adaptations for bipedalism; birth is typically a much longer and arduous process for humans compared to other animals, so we wouldn’t have much of an evolutionary advantage for it.
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