DS was born at 39 wks exactly... and I stopped work at 38 weeks... I was convinced by everyone saying 1st timers go late that iw ould be sitting around twiddlinv my thumbs so i worked til then... and then he came, and FAST!!!
so i think it is true the majority of 1st timers may be late, but dont count on it!

also, if like me you think it is great career wise to work later dont worry a bout it, no one remembers or thinks you are a hero for doing it - next time i will stop earlier!!