Quickly drink 2000ml of water to replenish the amniotic fluid can be drunk once a day, and it is recommended that pregnant women drink it within 2 hours. If a pregnant woman is found to have a low amniotic fluid volume through ultrasound examination, she can increase the amniotic fluid volume by drinking water. Liquid replenishment can promote the maternal blood volume increase, accelerate the maternal blood circulation, increase the uterine placental circulation, and thus increase the amount of amniotic fluid. The correct way to drink water is to drink 2000ml of water quickly within 2 hours, once a day, and the next day it is recommended to review the ultrasound to clarify the increase or decrease of amniotic fluid volume. The treatment of drinking water to replenish the amniotic fluid volume is suitable for pregnant women with slightly low amniotic fluid volume, normal fetal movement and no fetal hypoxia. If the ultrasound examination indicates that the amniotic fluid volume is particularly low and the fetal movement is abnormal, it is considered that the fetus has intrauterine hypoxia and the placenta is hypoplastic, so it is not suitable to drink water to replenish the amniotic fluid volume. If a pregnant woman drinks water continuously for 1 week, and then the ultrasound examination reveals that the amniotic fluid is further reduced, she should not continue to drink water to replenish the amniotic fluid and should be hospitalized in time.