The standard weight of newborns in China is 3000~3300g, and fetuses that reach or exceed 4000g are called “huge babies”. In recent years, the trend of huge babies in China is on the rise, which is also one of the reasons for the increase in the rate of cesarean delivery. Many people after pregnancy, the elders and husbands of the family are eager to let pregnant women eat more good, think that the larger the fetus grows the better, often heard pregnant women from the maternity checkup said, “doctor, my child is too small ah? But they don’t think about the many negative effects of a large fetus on the mother and the fetus. Huge babies are prone to cause certain hazards to the mother and to themselves during delivery, and the risk of adult chronic diseases such as hypertension and diabetes will be greater and may be earlier in life than in the general population. For the prevention of huge babies, first of all, it is important to control weight before pregnancy and maintain it in the normal body mass index range. Secondly, during pregnancy, it is important to control the diet, take proper supplements, reduce the intake of high-calorie, high-fat and high-sugar foods, keep your own weight and the weight of the fetus increasing at a uniform rate, and be properly active. More importantly, we should insist on systematic maternity checkups during pregnancy. If the maternity checkup indicates that the fetus is overweight, the pregnant woman can control her diet under the guidance of her doctor to prevent the fetus from growing too fast.