I had a few weeks off at around 13weeks, as I lost one twin and had hyperemesis. I then ended up working until 32weeks as we were moving interstate.
I was in a physical job and actually lied to the rostering guy about my EDD to keep getting shifts (the big boss knew and was happy for me to stay until I popped, but the roster guy was a jerk and as most of us were casual he loved playing power games if he had a reason to cut your shifts)