Umbilical cord prolapse refers to the rupture of the fetal membranes of pregnant women, and the umbilical cord falls out of the cervix. If the fetal membranes have been broken, the umbilical cord will further fall out from under the fetal presenting part, enter the vagina through the cervix, and even appear in the vulva through the vagina. Presentation of umbilical cord is also called latent umbilical cord prolapse, which means that the umbilical cord is located in front of or to one side of the fetal presenting part when the fetal membranes are not broken. Its incidence rate is 0.4% to 10%. Umbilical cord prolapse is extremely harmful to the fetus, because the umbilical cord is squeezed between the presenting part and the pelvic wall during uterine contractions, resulting in obstruction of umbilical cord blood circulation, fetal hypoxia, and severe intrauterine distress. If the blood flow is completely blocked for more than 7 to 8 minutes, the fetus will quickly suffocate and die.