Fetal hypoxia can lead to cloudy amniotic fluid, but the timing of fetal hypoxia and intrauterine distress cannot be determined. The main cause of amniotic fluid clouding is the evacuation of meconium into the amniotic fluid when the fetus is in intrauterine distress. And acute and chronic hypoxia of the fetus caused by factors such as umbilical cord around the neck, placental abruption, and hyperemesis gravidarum can lead to intrauterine distress. There are three degrees of amniotic fluid turbidity. Normal amniotic fluid is a clear liquid, while first-degree amniotic fluid turbidity is light green. In second-degree and third-degree amniotic fluid clouding, the amniotic fluid is darker in color and thicker, which can aggravate fetal hypoxia in the uterus. Fetal hypoxia resulting in third-degree amniotic fluid clouding indicates that the fetus has been suffering from hypoxia for some time, and the choice of cesarean section or natural delivery should be made taking into account the gestational age, the fetal heart condition, the contractions, and the degree of opening of the uterus. Pregnant women should go to the hospital regularly for prenatal checkups during pregnancy, and find abnormalities in fetal heartbeat and fetal movement and deal with them promptly to avoid intrauterine distress and cloudy amniotic fluid.