First time stopped work at 36 weeks and it was nice but I did get a bit bored towards the end. This time finished at 30 weeks as sooooooo over it and tired.( and Sydney commuters are not happy to give up a seat for anyone). Glad I did as I was turning into a bit of a monster at work. It all depends on how your pregnancy is going and how flexible and understanding your bosses/colleagues are! Good Luck!