In the last two months of pregnancy, the weight gain of pregnant women is about 0.3-0.5 kg per week, which means a maximum of 2 kg or 4 kg per month. In the late pregnancy, the fetus is growing rapidly, if the pregnant woman does not pay attention to control the diet at this time, excess nutrition will easily lead to excessive weight gain. Excessive weight gain in pregnant women increases the risk of gestational diabetes, which can also lead to excessive weight gain in the baby, which can increase the probability of a huge baby. If the baby weighs too much, it can affect the delivery and increase the chances of complications of postpartum hemorrhage, obstructed labor, and soft birth canal laceration. Therefore, during pregnancy, pregnant women must control their diet, whether in early, mid or late pregnancy, eating small meals and not overeating. The food like sweets and fats should be eaten less, and more exercise should be done so that the weight gain during the whole pregnancy is controlled to about 10kg is ideal.