Every person is different. But also every pregnancy is different. I have 4 kids and they were all different. Some I wore maternity pants, some I didn't. Some it took awhile to it into my old pants, one right away, and one I really had to work hard at it. So it's almost impossible to say.

I'm 30 weeks and can still wear my old pants just can't button them

I just see some women who wear them all the time. And I'm wondering if my hips aren't expanding or something because I figured my pants wouldn't be fitting. Don't we usually wear different pants afterwards? Because our hips space out.. idk if that's a dumb question I'm new to all this.. lol @jenngarcia1755, @ellieinmybelly,

With my 9 year old I wore a size 7 to the hospital when I was in labor.