No change in weight at 16 weeks is normal. A woman’s weight during pregnancy is related to many factors. If nutritious food is eaten regularly during pregnancy, it may lead to weight gain. However, if you eat a balanced diet and exercise properly, it is usually normal not to gain weight. It is normal to have no weight gain at 16 weeks of pregnancy, and the average rate of weight gain in mid and late pregnancy is 0.5kg/week. If there is no weight gain at 16 weeks, it may also be an indication of inadequate intake of carbohydrates, fats and proteins, which is harmless for a short period of time. In addition, it is normal not to gain weight at 16 weeks of pregnancy, and there is no need to worry as long as all fetal indicators are normal. If the nutritional intake is insufficient for a long period of time, it is detrimental to the growth and development of the pregnant woman and the fetus. In addition, weight gain throughout pregnancy should be controlled at 25-30 pounds. If the weight gain is too much susceptible to gestational diabetes, may also lead to increased blood pressure, it is recommended to follow the doctor’s advice in time to improve.