The importance of nutrition during pregnancy: too much or not enough nutrition during pregnancy can have a great impact, and previous studies have mentioned that the nutritional environment in the early intrauterine period is associated with the incidence of non-communicable metabolic diseases in adulthood. The literature reports that the prevalence of diabetes and pre-diabetes states in our country reaches about 25%, and certain studies at the First Hospital of Peking University also show that the proportion of obese and overweight women during pregnancy reaches more than 20%, which is a very appalling figure, while the occurrence of chronic non-communicable diseases (chronic diseases) such as obesity and diabetes in adulthood may be related to intrauterine nutrition, that is, the first day of the first 1000 days of life. stage. The problems that may be caused by intrauterine nutrition: 1, excess nutrition: the impact on the mother will lead to maternal obesity and even the occurrence of gestational diabetes; the impact on the fetus will produce a huge fetus, and in the long term will increase the incidence of metabolic diseases. 2, nutritional deficiencies: for the fetus, the fetus may appear in the near future, fetal growth restriction, but also the performance of the corresponding nutrient deficiencies; the possibility of metabolic diseases in adulthood will be higher. How to rationally deploy dietary nutrition: pre-pregnancy BMI < 18.5: < span=""> 35-40 Kcal/kg energy intake per day during pregnancy. Pre-pregnancy BMI of 18.5<< span="">BMI<25< span="">: 30-35 Kcal/kg of energy per day during pregnancy. Pre-pregnancy BMI>25: Low energy intake. Principles of dietary intake: Carbohydrate: 50-60% Protein: 15-20% Fat: 25-30% Dietary fiber: 25-35g Ensure vitamin and mineral intake Limit salt intake 6g Note: If you have hidden diseases or illnesses you should follow the principles of medical nutrition treatment. 1.Control total calories to avoid low calories for ketosis. 2.Balanced diet, food diversification. 3.Small amount and multiple meals, regular ration. 4.With a certain amount of physical exercise. Weight management during pregnancy: BMI<18.5 before pregnancy Weight gain 12.5-18KG 18.5<< span="">BMI<25< span=""> before pregnancy Weight gain 11.5-16KG BMI>25 before pregnancy Weight gain 7-11KG Weight gain during pregnancy is also an effective indicator to judge whether the nutrition during pregnancy is reasonable, too much weight gain, late pregnancy If you gain too much weight, complications such as pre-eclampsia will easily occur in late pregnancy, which will have an impact on the prognosis of mother and child. BMI=weight(Kg)/height2(m)