I left at 35 weeks with DD1, wasn't working with DD2. I didn't do a lot of heavy lifting but I did do 12 hour shifts and I was ready to leave. It was also the week before christmas so I got out of working christmas as well But I had colleagues that worked a lot longer as well. How much leave do you get? Because unfortunately you don't want to leave to early then use half of your mat leave still being preggers.