I'm 28 and this 5th girl might be the last one. I always wanted to be done before turning 30, I started when I was 19. But now I'm considering leaving a small opening there for the next 5 or so years before I completely close the doors. Depends on the future I guess. I have no intention of having another baby long after my others. But I still never got my boy and some day IVF/PGD might actually be a possibility for us (it's not right now). I would hope my youngest would be in school before one of my girls has the first grandchild though, so maybe 35 is my highest limit.