Too fast weight gain in late pregnancy may be related to edema, and may also be caused by excessive nutrition and excessive amniotic fluid. 1. edema: the hormones secreted by the placenta and the increased level of aldosterone in the body, so that water and sodium retention in the body can not be discharged in a timely manner, which will lead to the phenomenon of rapid weight gain in late pregnancy. 2. Excessive nutrition: If a woman overeats in late pregnancy and eats more high-calorie foods, she may be over-nourished and be prone to rapid weight gain in late pregnancy. 3. Excessive amniotic fluid: If the weight rises too quickly in late pregnancy, it may also be caused by excessive amniotic fluid, and it is recommended to have regular checkups. If a pregnant woman’s weight rises too quickly in late pregnancy, it is recommended that she go to the hospital in time to identify the cause of the disease and standardized treatment.