It is going to vary for every woman. I
put on a TON of
weight during my first pregnancy, even when I was
eating healthy and walking, I retained a lot of water, I am hoping this time around it is less. Some women will only gain 20 lbs. the whole of their pregnancy. Some women get a lot of morning sickness so they don't gain much, some women go crazy and eat everything and put on a lot of weight. If you start out underweight the Dr.