The methods of breech to cephalic position are chest and knee position and external inversion. 1. Chest and knee position: For those who are still in breech position after 30 weeks of pregnancy, they need to be instructed to correct it. After the pregnant woman empties her bladder, she will be instructed by the doctor to perform the chest and knee position, which will make the fetal buttocks withdraw from the pelvis by utilizing the role of the center of gravity, and then transpose them to the head position. It can be performed 2-3 times a day for 15 minutes each time, and reviewed after 1 week. 2. External inversion: For those who are still in the uncorrected breech position at 36 weeks of gestation, after full evaluation by a professional physician and exclusion of contraindications such as cephalopelvic disproportion and scarred uterus, external inversion will be performed under ultrasound guidance, and the changes in fetal heartbeat and movement will be closely monitored after the operation. If the above methods fail to convert the breech position to cephalic position, a suitable mode of delivery should be chosen after evaluation by a doctor.