DD's orthopedic surgeon told me he doesn't worry about bubs (without any medical issue) not walking until they're about 22 months old. He said that is a perfectly reasonable amount of time for them to show signs of walking. I asked him after my MCHN got on my case. As far as crawling goes, I don't have an answer there.

How's your bub doing, Shoshana? Hope you had a nice trip home