Humans have to deliver their babies earlier in the development process than other animals due to our frames or else we wouldn’t be able to actually deliver the baby. Birthing is already hard enough for women. Imagine a toddler coming out.
Other animals are able to more easily pass more developed offspring. This is due to a combination of the way our pelvis is built in order to stand upright and also the large size of our heads that we developed to be able to hold our larger brains.
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