At what stage of "overdue" does it happen? Anybody know? Is it standard (I know it's 42 weeks a lot of places), or does it vary? I've just crossed 40 weeks and I'm sure I have a little time, but I like to have my information in advance. I'll ask my midwife at my next appointment if I'm still pregnant then, but that's not for another week and it's really just an idle curiosity thing so I hate to bug them.