I had an almost-finished post ranting about the evolution of the human pelvis, but I'm now bored with it. It can be summed up as: human birth is very poorly designed.
Happily, both me and my baby survived it mostly intact.
The dogs are doing very well with an infant do far: they're acting the exact way they do when I have a foster puppy or kitten in the house. Interested but not obsessed.