Cesarean scar pregnancy (CSP) is a pregnancy in which the pregnant egg is implanted in the uterine scar after cesarean section. Is a special kind of ectopic pregnancy[1]。 In the past 10 years, with the increase of cesarean section rate year by year, the incidence of CSP has been on the rise. If patients with CSP are not diagnosed early and properly managed, severe bleeding may occur, and even hysterectomy may occur. In severe cases, it is life-threatening and causes serious health damage to women. If CSP continues into the second or third trimester, the risk of placenta implantation, abdominal pregnancy, uterine rupture, and bleeding is greatly increased[2]Therefore, in order to better diagnose and treat CSP and reduce its harm to women's reproductive health, the Family Planning Branch of Chinese Medical Association formulated the "Consensus on Diagnosis and Treatment of Cesarean Scar Pregnancy" with reference to relevant literature at home and abroad, suggesting that medical and family planning technical service institutions at all levels should implement it with reference, and constantly accumulate experience in practice and gradually improve it.