38 weeks of pregnancy belongs to the late stage of pregnancy, at this time the child is already full-term, the weight should be around 6 pounds, the length of the femur is about 7cm, the length of the biparietal diameter is about 9.2cm, and the abdominal circumference is about 30cm.However, these are only medically estimated values, and not every child should be based on this value as a standard, and the specific needs to be viewed in accordance with the growth and development of the child throughout the pregnancy. If the child weighs too much in late pregnancy, it is usually caused by over-nutrition, which may lead to difficult labor, postpartum hemorrhage, and so on. Therefore, pregnant women should pay attention to diet control, avoid eating oily and sugary food, eat more light and easy-to-digest food, and control their weight. If the child’s weight is too small in the late stage of pregnancy, it may be caused by insufficient nutrition. It is suggested that pregnant women should pay attention to strengthening nutrition, and it is advisable to eat diets rich in high-quality proteins, such as fish, shrimp, eggs, milk, beef and so on. For pregnant women who are partial to food, or have severe pregnancy vomiting, as well as insufficient intake of protein and vitamins, it is recommended that they be hospitalized for infusion of supplemental nutrients to promote the growth of the fetus.