Hi Fiona, I worked right up until 1 week before I was due, I am like you, I had a desk job, my boss just let me work 9am - 3pm which was great cause I got a sleep in and got to finish reasonably early. But its completely up to the individual, no-one can tell you when you should give up work (maybe the doctor though!) Why don't you speak to your boss and see whether they may be able to shorten your hours for you so you don't go stir crazy at home? Also, I was so sick of sitting at home after I had Sam that I went back to work 3 days a week when he was 2 &1/2 months old. It wasn't so much that I was bored, it was more trying to survive on 1 wage. But seriously, do what feels right to you.