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19 out of 20 found this helpful. Bending over will not hurt you unborn baby. I worked out through my 41st week of pregnancy with my daughter and everything was fine. (I think I had an easier labor because I was limber.) You do need to be careful not to fall while pregnant.
With consecutive pregnancies, it happens closer to delivery, or may not even happen until delivery. My baby dropped 4 weeks before she was born. As far as the head down position, its not uncommon for babies to turn into position around 20 weeks. With pregnancy #1, my baby was turned down by 24 weeks. With this pregnancy, baby has been turned down since at least 28 weeks, but it may have been sooner.