Weight Gain During Pregnancy | Body type | Acceptable Gain | | Underweight | 28 to 40 lbs | | Normal Weight | 25 to 35 lbs | | Overweight | 15 to 25 lbs | | How Weight is Distributed | from: A.C.O.G | | 7 lbs | Maternal stores (fat, protein, and other nutrients) | | 4 lbs | Increased fluid volume | | 2 lbs | Breast enlargement | | 2 lbs | uterus | | 7 1/2 lbs | Baby | | 2 lbs | amniotic fluid | | 1 1/2 lbs | Placenta (afterbirth) | |