In clinical practice, some pregnant mothers weigh more than 200 pounds, and it is extremely common for them to gain 40-50 pounds throughout pregnancy, and the number of newborns weighing more than 8 pounds is increasing every year. Some pregnant mothers mistakenly believe that the more a woman eats during pregnancy, the more nutrients she can provide to her baby, the healthier the baby will be, so she must eat “hard”! Most pregnant women, once pregnant, will become the “key protection” of the family, and even pregnant mothers do not want to eat, family members also tried to advise, resulting in rapid weight gain of pregnant women. The necessary nutrition during pregnancy is necessary to ensure the physiological needs of the mother and the healthy growth of the baby, but what our obstetricians see is that during pregnancy women eat too much, improperly proportioned nutrients, which can easily lead to excess nutrition, thus making the weight exceed the normal range. Being overweight can create serious risks for mother and child. Overweight pregnant women can cause many medical conditions, such as complications of gestational hypertension and gestational diabetes, and can also increase the probability of conceiving a huge baby. Huge babies lead to more cesarean deliveries and unsightly stretch marks become more difficult to avoid. According to U.S. experts, a study of more than 20,000 full-term infants found that pregnant women who gained excessive weight during pregnancy had infants with generally lower APGAR scores (a composite of five indices of newborn skin color, heart rate, frowning movements after stimulation, muscle tone and breathing). Also, infants with excessive maternal weight gain are more likely to have epilepsy, hypoglycemia, and meconium aspiration syndrome, and the infants may be born smaller. Measuring maternal weight is an important part of prenatal checkups, and weight management during pregnancy is a healthy pregnancy model advocated in recent years to make mothers healthier and children safer through weight management during the 280 days of pregnancy. Too much or too little weight gain is considered abnormal. Weight gain during pregnancy varies from person to person. According to BMI during pregnancy, i.e. body mass index = weight (kg)/height (m)2, for thin pregnant mothers with BMI less than 18, it is appropriate to gain 12kg~15kg; for overweight pregnant mothers with BMI more than 24, weight gain should be controlled at 7kg~10kg, and for pregnant mothers with normal body type (BMI 18~24), the appropriate weight gain is Appropriate weight gain can ensure the optimal development of the fetus and maternal tissues and reduce the risk of low birth weight/huge babies, obstructed labor and pregnancy complications. Strengthening maternal and fetal weight management during pregnancy can reduce the incidence of huge babies and reduce cesarean deliveries due to huge babies, as well as reduce the incidence of obstructed labor in the first position and reduce cesarean deliveries during labor. According to statistics, a large proportion of expectant mothers have excessive weight gain during pregnancy, and the rate of huge babies born in our hospital has been increasing year by year, now reaching 15% or even higher, some pregnant mothers are not mainly standardized prenatal checkups, and often come to our hospital for delivery at the end of pregnancy, when it is too late to manage their weight; huge babies have also become the main reason why many pregnant mothers give up normal delivery and choose cesarean delivery. Nutritional monitoring during pregnancy helps to detect possible nutritional risks of pregnant women and abnormalities in fetal growth and development. As for when to start nutritional monitoring, many mothers-to-be are not aware of it until they are 18 to 20 weeks pregnant. By this time, more than half of them are already over the nutritional limit. Some mothers-to-be don’t even recognize nutritional monitoring until they are diagnosed with abnormal glucose tolerance or other pregnancy-related complications. For this reason, mothers-to-be are reminded that nutritional monitoring should be advanced to early pregnancy or even before pregnancy. Nutritional monitoring during pregnancy should be enhanced for pregnant women who are at high risk. Through nutritional monitoring during pregnancy, not only can we guide nutritional supplementation to prevent the fetus from becoming too large or too small, but also avoid pregnancy complications such as gestational diabetes and gestational hypertension, thus reducing the occurrence of future diseases in adulthood. The Department of Obstetrics and Gynecology of the Fourth Hospital currently provides nutritional intervention and weight management for pregnant women during pregnancy. After the opening of the Pregnancy Nutrition Clinic from 1 to 5 mornings a week, a full-time dietitian provides specialized nutritional monitoring, assessment and personalized nutritional guidance for pregnant women, thus preventing related diseases and complications and protecting the health of pregnant mothers and fetal babies.