It may be normal for pregnant women not to gain weight in late pregnancy, or it may be due to reasons such as poor fetal development, and it is recommended to make judgment in conjunction with the condition of the fetus. In late pregnancy, the development of various body organs of the fetus tends to mature, and the weight of the pregnant woman is maintained at a certain level; or with the increase in the number of weeks of pregnancy, the amount of amniotic fluid in the uterus gradually decreases, and the weight of the fetus increases, so that the weight of the pregnant woman will remain relatively stable, and all of the above is a normal situation. However, it is not excluded that the fetus is underdeveloped or the pregnant woman does not have enough nutrition, etc. If there is no increase in fetal weight, it is recommended to go to the hospital to check the development of the fetus. At the same time, pregnant women should pay attention to the weight change of the fetus, if the nutritional supplementation is excessive, it may cause gestational obesity, hypertension, diabetes, giant fetus and other diseases, which is not conducive to the delivery of the pregnant woman, postpartum recovery and the growth and development of the fetus. During pregnancy, pay attention to more rest, at the same time should relax, avoid tension, anxiety, any discomfort should be timely to the hospital, by the doctor to clarify the diagnosis, and cooperate with the doctor to deal with the symptoms.