How much water do pregnant women drink a day to ensure amniotic fluid?

Oligohydramnios is mainly related to the decrease of amniotic fluid production or the increase of amniotic fluid leakage. Some of the causes of oligohydramnios are unclear. The causes of oligohydramnios are: first, fetal malformation, mainly fetal urinary system malformation. Second, placental dysfunction, such as prolonged pregnancy, fetal growth restriction and placental degeneration. Third, amniotic diseases, such as amniotic permeability changes, inflammation, intrauterine infection, etc. Fourth, pregnancy hypertension disease, maternal dehydration, insufficient blood volume, premature rupture of membranes, etc. If there is no pathological situation, pregnant women only need normal diet and drinking water every day, you can ensure that the amount of amniotic fluid is normal. If amniotic fluid is less, you can drink more water to increase the amount of amniotic fluid.