At 40 weeks + 4 weeks gestation amniotic fluid index of 63mm can induce labor. At 40 weeks + 4 days gestation, the pregnancy is full term, the fetus has matured, and the amniotic fluid is in the low range. Continuing to wait for delivery the placenta may further deteriorate, resulting in fetal hypoxia, which will have an impact on the development of the fetus. If the size of the pelvis and the biparietal diameter of the fetus are assessed to be within the normal range, labor can be induced and a vaginal delivery can be performed. When a pregnant woman is already 40 weeks pregnant, she needs to go to the hospital in time, improve the prenatal examination, wait for labor, and under the guidance of the doctor, induce labor and delivery to ensure the health of the pregnant woman and the fetus.