Almost every woman has to go through the situation of carrying and giving birth to a child. Pregnant mothers who love beauty are worried about gaining weight during pregnancy, in fact, too much weight gain during pregnancy is not conducive to the health of the pregnant mother herself and the growth and development of the fetus. How to control weight reasonably before pregnancy? For pregnant mothers with normal pre-pregnancy body mass index, it is best to control the weight gain of about 12.5kg during pregnancy. It is recommended that pregnant mothers gain about 1.5kg per month from the third month of pregnancy to the seventh month of pregnancy, and 0.5kg per week after the seventh month of pregnancy until delivery. the level of pre-pregnancy BMI determines the amount of weight gain at each stage of pregnancy. If a pregnant mother is in an obese state before pregnancy and does not control her weight properly during pregnancy, an increase of about 10kg during pregnancy is sufficient. Therefore, in the early stage of pregnancy, pregnant mothers should control their diet reasonably, eat less oil, frying and other incorrect eating habits, and eat a balanced diet. Develop good eating habits, eat less sweets and junk food such as too salty, too oily, etc. Especially in early pregnancy there will also be early pregnancy reaction, loss of appetite, partial eating, anorexia and other situations are more common, pregnant women in this stage should pay attention to a light diet, eat less and more meals, avoid the intake of alcohol and caffeine, for early pregnancy reaction is more serious pregnant mothers, must try to eat. In addition, develop good eating habits, pay attention to three meals at a fixed time, reasonable additional meals, appropriate exercise, and avoid prolonged lying. Weight gain during pregnancy is related to the health of both people, and it is also very important to develop regular exercise.