If my fellow women are anything like me, reaching a certain age also led them to a keen feeling of being duped. Up until the very day you reach that certain age, the rhetoric is all "you're still young... you still have time... live your life." But no one follows that up with "But by age 33, 9 months and 14 days, be done and be pregnant, because then your time is up."
The switch flips overnight, and FYI.
My husband and I started trying to get pregnant when I was 33. I still felt young and unsure we were ready. I was, however, very sure that I was ready to stop getting "The Question." If you've made it past 30 without procreating, you've likely gotten the tentative yet probing "so do you think you'll ever want kids?"