Question: how much weight does my baby gain in the last trimester?
Answer: Rapid weight gain During the final months of pregnancy, your baby gains the most weight. In fact, according to the American Pregnancy Association, a fetus weighs around 2 pounds at 27 weeks, 4 to 4 ½ pounds by 32 weeks, and grows up to between 6 ¾ pounds to 10 pounds, if you have a full-term delivery.