An amniotic fluid index of 6.5 at 37 weeks of pregnancy suggests low amniotic fluid, which can be observed dynamically and requires hospitalization if necessary. The production and absorption of amniotic fluid in a normal pregnancy is in dynamic balance, and an abnormal amount of amniotic fluid in late pregnancy signals the presence of potential maternal and infant complications, and may also directly jeopardize perinatal safety. At 37 weeks of pregnancy, amniotic fluid index ≥ 8.0cm is normal. When the amniotic fluid index is > 5.0cm and < 8.0cm, it suggests that the amniotic fluid is on the low side, so you can monitor the fetal heartbeat and fetal movement changes closely, and review it on time. If the amniotic fluid index is >8.0cm, the patient can continue to wait for delivery; if the amniotic fluid index is still <8.0cm, the patient needs to be hospitalized. For the combination of fetal distress or rupture of membranes, amniotic fluid and fecal matter contamination is serious, and a short period of time can not be delivered, cesarean section is required to terminate the pregnancy. If the fetal reserve function is good, can follow the doctor's instructions of static drip contractions through the vaginal trial of labor, abnormal conditions need to be timely surgical termination of pregnancy. Amniotic fluid index of 6.5cm at 37 weeks of pregnancy should be rechecked under close monitoring of fetal heartbeat and fetal movement, and appropriate treatment should be given according to the rechecking situation.