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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.
A baby needs to develop muscle strength to be able to roll over, first from tummy to back, then vice versa. Babies may be able to roll over from tummy to back as early as 3 months and should be able to do so by 6 or 7 months. While lying on his or her tummy, you may first notice at about 3 or 4 months your baby lifting his or her head up.