Having a healthy baby is the desire of every parent-to-be. As the economy improves, more and more attention is being paid to nutrition during pregnancy, and many people deliberately take extra supplements after pregnancy. But this is a misconception. The more you eat during pregnancy, the healthier your baby will be. Because of this, gestational diabetes and huge babies are increasing year by year in the city. Weight gain during pregnancy is directly related to the nutrition during pregnancy. Excess nutrition and excessive weight gain increases the chance of diabetes, and the fetus is prone to obstructed labor and injury during delivery because of its excess weight; and with insufficient nutrition during pregnancy, the fetus shows low birth weight, and these children have more health problems. So how much weight gain is appropriate for 9 months of pregnancy? In fact, there is no standard answer to this question. Li Ying of the Department of Gynecology, Urumqi Hospital of Traditional Chinese Medicine, according to BMI to see how much weight needs to be gained For people with different body types, they need to be treated differently. Overall, thin people can gain more weight, while fat people have to control their weight gain more strictly. Distinguish between fat and thin, in medical terms, is expressed in terms of body mass index (BMI), BMI is weight divided by height squared, where weight is measured in kilograms and height in meters, the normal value of BMI is 20 to 24 (kg/m2). Therefore, to understand how much weight you need to gain during pregnancy, the first thing is to know your pre-pregnancy BMI. 20kg of weight gain throughout pregnancy is appropriate for those with a very thin body type (BMI less than 18). For those with a thin body type (BMI of 18 to 20), a weight gain of 13 to 17 kg during pregnancy is appropriate. For a normal body type (BMI 20-23), a weight gain of 12kg throughout pregnancy is normal. For obese body type (BMI greater than 23), weight gain of 8 to 11 kg throughout pregnancy can be used for some internal energy storage. In case of twin or multiple pregnancies, the doctor should be consulted, as weight gain is related to the number of fetuses. Weight gain should be slow and steady. Weight gain during pregnancy is not uniform, and for normal weight people, a weight gain of 1 to 2 kg is appropriate in the first 3 months of pregnancy. In early pregnancy, appetite may be affected due to pregnancy reaction, but it is important to ensure nutrition during this period for fetal development. Danish studies have found that poor nutrition in the early stages of pregnancy is associated with a greater risk of diabetes and hypertension in the later years of life. Therefore, if the early pregnancy reaction is heavy and affects eating, it is advisable to eat less and eat more, vomit and eat more food that is beneficial to the child’s brain development. Protein, inorganic salts, vitamins and sugar are all essential ingredients for the development of the fetal brain, so pregnant women should diversify their food and should not abstain from eating too much. Many pregnant women after the pregnancy reaction stage, appetite improved and began to eat a lot to make up for the shortage of the first, which is also wrong. The fetus has its own growth and development rules, and excess nutrition will only be absorbed by the mother and cause obesity. The best way to gain weight is a slow but steady increase. In the middle and late stages of pregnancy, it is appropriate for a normal-sized person to keep the weight gain to about 0.5kg per week. Too slow weight gain indicates that the fetus is lagging behind weight gain is too slow or stagnant and does not grow, which may indicate the existence of fetal growth lagging behind and easy delivery of low weight children, who are prone to many diseases. Excessive or rapid weight gain during pregnancy is also not good for the mother and the fetus. Excessive weight gain may indicate the presence of gestational diabetes. For the mother, too much weight gain can predispose her to obesity and diabetes after delivery. Excessive fetal weight gain also predisposes to the delivery of a large fetus (birth weight greater than 4 kg). Huge babies are not easy to pass through the birth canal during delivery, which increases the chance of cesarean section, or difficult delivery and birth injury during delivery, and also prone to neonatal hypoglycemia after delivery. Therefore, it is not better to eat as much as you can during pregnancy, and you can consult a nutritionist to adjust your diet during pregnancy if necessary.