Breech position at 30 weeks plus one week of umbilical cord around the neck may be reversed to cephalic position, but it is not absolute, it depends on the individual pregnancy, human intervention is not recommended if the umbilical cord around the neck has not been released, and it may be possible to reverse the cephalic position after the umbilical cord around the neck has been released through human intervention. It is possible to correct the breech position to cephalic position at 30 weeks of pregnancy, but with one week of umbilical cord wrapped around the umbilical cord in the uterus by ultrasound, it is not possible to reverse the fetal position by human intervention for the time being. Umbilical cord around the neck will lead to the shortening of the umbilical cord. When correcting the fetal position through knee-chest position and external inversion, due to the shortening of the umbilical cord and the rotation of the fetus in the uterus, the umbilical cord will be excessively stretched causing intrauterine distress, and in severe cases, premature placental abruption will occur. It is important to observe whether the fetus lifts the umbilical cord around the neck on its own after intrauterine activity at 30 weeks of pregnancy. Without umbilical cord around the neck through human intervention, such as knee-chest position and external inversion treatment, the breech position may be converted to cephalic position. If the umbilical cord is wrapped around the umbilical cord for one week at 30 weeks of pregnancy, the umbilical cord has not been lifted, and the fetus has not changed its position on its own, the breech position usually cannot be converted to the cephalic position. After pregnancy, do a good job of pregnancy obstetrical examination, there is fetal position incorrect can be under the guidance of the doctor to intervene.