The eating method that only grows the fetus but not the meat during pregnancy does not exist, and weight gain is common to both the pregnant woman and the fetus. Weight gain during pregnancy is beneficial to fetal development and postpartum lactation. You should not blindly pursue weight maintenance and weight loss during pregnancy, but should eat a balanced diet to maintain appropriate weight gain. During pregnancy, it is recommended that the diet be based on high protein foods, more fresh vegetables and fruits, and regular weight monitoring. Early pregnancy weight gain is recommended to be controlled at about 1~2Kg, mid-pregnancy and late pregnancy is recommended to increase the weight by about 0.5Kg per week, and the whole pregnancy weight gain is about 12.5Kg. Diet is recommended to eat more eggs, milk, lean meat and other high-protein foods, more fresh vegetables and fruits. Excessive or slow weight gain of pregnant women will have a bad effect on the fetus. It is recommended to have a normal diet, prohibit smoking and alcohol, have regular maternity checkups, monitor weight and exercise appropriately.