Pregnant mothers who choose natural delivery must first consider whether they have the conditions for natural delivery. The most important are these two conditions: 1. There are no complications between mother and child; 2. The three elements of delivery are a normal fetus, birth canal and productivity. Regarding the three elements of childbirth, it is necessary to explain in detail. First, the fetus is normal; it cannot be too large. A fetus exceeding 4kg is considered macrosomia. The fetus cannot be deformed, and conjoined twins cannot be delivered naturally. Secondly, the birth canal must be normal; the pregnant woman\’s pelvis must be normal, neither deformed nor narrow, and able to allow the fetus to pass; if the soft birth canal is scarred or deformed, it is uncomfortable