A newborn with a birth weight of ≥4000 grams is called a giant baby. The normal birth weight of a newborn is 2500-3999 grams, and the more ideal birth weight is around 3100 grams. In recent years, the birth rate of huge babies is increasing, and many family members mistakenly believe that the fatter the baby is, the smarter the baby is, and that fat babies are better to feed. In fact, otherwise, the baby was born too fat can cause the following adverse effects: 1, the impact of childbirth on the mother and child The vast majority of huge children are born by cesarean section. Medical research has proved that: cesarean delivery of newborns without the birth canal extrusion, it is not easy to adapt to the sudden changes in the external environment, can not be timely discharge of respiratory fluid, so the postnatal pulmonary complications are significantly higher than the vaginal natural birth of newborns. In addition, due to the large size of the fetus, birth injuries (clavicle fracture, brachial plexus injury, intracranial hemorrhage, etc.) and asphyxia can occur and, in the worst cases, cause neonatal death. Very few huge babies can also be delivered vaginally (mostly transmaternal), but the mother is very prone to postpartum hemorrhage, birth canal injury, etc. In serious cases, uterine rupture and uterine prolapse may even occur, even endangering the mother’s life. 2, the impact on the mother before and after childbirth The mother who produces a huge child is often overweight during pregnancy, and the risk of gestational diabetes increases; after childbirth often left behind excessive obesity, abnormal body shape, loose skin, etc., and the potential for chronic diseases increases after middle age. 3. Long-term effects on infants Huge children are at high risk in child health care, and are the focus of pediatricians’ observation and follow-up. Huge children are prone to hypoglycemia, erythrocytosis, hyperbilirubinemia, and other diseases. Some of them have rapid weight loss after birth and are often associated with sclerosis. Even if no complications are found at birth, they are prone to obesity, diabetes, hypertension, hyperlipidemia, and heart disease when they grow up. There are two main reasons for the birth of a huge baby: over-nutrition during pregnancy (the majority); second is gestational diabetes (a minority), pregnant women usually have normal blood sugar, due to abnormal pancreatic function after pregnancy. The key to preventing the birth of a huge baby is a change in concept: that is, the more you eat and rest during pregnancy is not the better. The correct approach is: women should pay close attention to the growth and development process of the fetus after pregnancy, and go to the hospital for glucose tolerance testing and nutritional counseling when they find that the fetus is growing too fast, so as to reasonably adjust the diet and nutritional ratios and avoid the occurrence of hidden diabetes; at the same time, do heart ultrasound examination for the fetus to clarify the presence of congenital heart malformations and facilitate early intervention.