Abstract: Objective To compare the therapeutic effect of two uterine artery embolization (UAE) modes combined with dilatation and curettage (D&C) under ultrasonic monitoring in the treatment of cesarean scar pregnancy (CSP). 
Methods Retrospective analysis was performed on the data of 96 patients with CSP in our hospital. According to the patient′s wishes, all patients were divided into group A (n=73) and group B (n=23). Group A was treated with uterine artery chemoembolization (UACE) combined with ultrasound-guided D&C, while group B was treated with UAE combined with ultrasound-guided D&C. Comparison was made between two groups on the proportion of negative conversion of β-HCG and menorrhagia at 5 weeks after surgery, length of hospitalization, hospitalization expenses, intraoperative blood loss, proportion of blood transfusion and proportion of secondary treatment. Salpingography was performed at three months after the operation to monitor the patency of the fallopian tubes, and a three-year telephone follow-up was conducted for the second pregnancy and the recurrence of CSP. 
Results The level of β-HCG before D&C was significantly different between two groups (P＜0.05). The proportion of negative conversion of β-HCG and menorrhagia at 5 weeks after operation in group A was higher than that in group B (P＜0.05), and intraoperative blood loss, and the proportion of intraoperative blood transfusion and secondary treatment were lower than those in group B (P＜0.05). The rate of fallopian tube patency in group A was higher than that in group B at three months after operation (P＜0.05), and the ratio of ectopic pregnancy, CSP recurrence, normal pregnancy, abortion and live birth at three years after operation in the two groups was not significantly different (P＞0.05). No serious postoperative complications such as ectopic embolism, massive hemorrhage and uterine rupture occurred in either group. 
Conclusion Compared with UAE combined with D&C under ultrasonic monitoring, UACE combined with D&C under ultrasonic monitoring can reduce intraoperative bleeding and improve the therapeutic effect more effectively.

Key words: pregnancy, ectopic, uterine artery embolization, ultrasonography