I always said my cut off would be 30; but I married at 19 so I had 11 years to fulfil that requirement lol I will hopefully be having my last baby right before I turn 30.

My parents were older parents (28-35 having kids) and I can always remember my mother telling me when she was 40 that she should have been enjoying kids going into highschool not sending one off to kindergarten and she encouraged me not to wait that long to have kids. So thats always influenced my decision.