Women who need a cesarean section generally have more or less problems with the fetus or the mother. Difficulty in labor exists in several aspects: 1, cephalopelvic disproportion, refers to the narrow pelvic inlet plane, the fetus relative to the maternal pelvic inlet is relatively large, the fetus is obviously larger or the pregnant woman’s pelvis is obviously narrowed, resulting in the fetus can not enter the pelvis, can not go through the vaginal delivery, in the full-term pregnancy needs to be carried out by cesarean section surgery; 2, the bone obstetrics or soft obstetrics anomalies, for example, pregnant women who have had a fracture of the coccyx may be the tip of the coccyx upward, so that the effective obstetrics channel narrows, and the fetal or fetal position abnormalities, such as some breech, transverse, abnormal head position or multiple births in some cases are not suitable for normal delivery, need to perform a cesarean section; 3, in addition, the umbilical cord prolapse, fetal membranes have been ruptured in pregnant women, the fetal umbilical cord over the prenatal exposure of the first part of the fetus, the first to come out of the vagina, known as the umbilical cord prolapse; 4, there is also a fetal distress, which refers to the lack of oxygen in the uterus, which results in fetal acidosis; 5, a history of cesarean delivery in the past , which is prone to uterine rupture or preeclampsia and requires a cesarean section.