It is normal for a pregnant woman to gain 30 pounds. It is normal for pregnant women to gain 20-30 pounds during pregnancy, but it should be compared with their pre-pregnancy weight. If the pre-pregnancy weight is heavy, it is more important to strictly control the weight during pregnancy, weight gain of 10-20 pounds is more reasonable, if the pre-pregnancy weight is light weight gain of 35 pounds is also normal. In general, the first trimester of pregnancy weight gain 1-4 pounds, after the middle of pregnancy weekly weight gain is not recommended more than 1 pound. If the weight gain is too fast, it is easy to cause the fetus to grow too fast and the birth of a huge baby will have a negative impact on the future healthy growth. If the weight gain in the middle of pregnancy exceeds 1 pound per week, it is necessary to control the diet properly and not to eat foods high in sugar and fat. Pregnant women who gain weight too quickly are prone to gestational diabetes and gestational hypertension, which increase the risk of pregnancy and make normal delivery more difficult due to the large fetal growth.