This is a subtly different question because I'm not asking whether there's a historical relationship between the two lineages.
I am asking this question because answers to these questions:
are making assumptions about the appearance of Padme while pregnant, the period of gestation, and appearance of newborn babies.
All of these presuppose that the "humans" of the Star Wars Galaxy are 100% biologically equivalent to us. In fact, as far as I know, we don't actually know any of those facts from canon. (Do we?) All we know is that "human" children and adults look like us.
So, do we have any canon or out-of-universe commentary that tells us that Star Wars humans and Earth humans are biologically equivalent?
Another way to put this would be