system
Given the following post, respond as if you're commenting on Reddit:
human
So human babies are woefully underdeveloped at birth compared to other mammals. How would, theoretically, a much longer pregnancy affect human development?

So our pelvis is now made for walking on two legs and our craniums are large, explaining *why* this is necessary. However, would this be possible, and what would the implications be?

Would a longer pregnancy have any positive effects whatsoever? What would be the effect of the deprivation of sensory input? Any other implications? Would things such as in utero sound stimuli have a greater effect after, say, 12 months or longer?
gpt
There aren't many animals hunting our babies.

Most predators have offspring that are pretty helpless at birth, while prey animals, antelope, deer, gazelles, are generally ready to run shortly after being born.  This seems like it would be the selective pressure going on.