The ideal weight gain during pregnancy is divided into two time periods: 1) early pregnancy, that is, before the 14th week of pregnancy, the recommended weight gain is 1-2kg throughout the early pregnancy, because during the early pregnancy, the mother’s early pregnancy reaction may be more serious due to the influence of hormones, such as indigestion, nausea, and even vomiting, which may lead to insufficient calorie intake during early pregnancy. The weight gain during early pregnancy is relatively slow. 2. In the middle and late stages of pregnancy, that is, after 14 weeks of pregnancy, it is recommended to gain 0.3-0.5kg per week, but if the body type before pregnancy is obese, it is recommended to gain 0.3kg per week. 10-12kg is the total weight gain in the middle and late stages of pregnancy, and 7-9kg for obese pregnant women, which is lower than the standard for normal weight pregnant women. The normal weight of pregnant women to standard to be lower. There is also the need to maintain a normal energy intake during pregnancy, if the weekly weight gain is less than 0.3kg, or more than 0.55kg, people should properly regulate their diet, so that the weekly weight in the middle and late stages of pregnancy is maintained at about 0.5kg.