剖宫产术后疤痕处妊娠(cesarean scar pregnancy,CSP)是受精卵、滋养叶细胞种植于前次剖宫产切口瘢痕处,被子宫肌纤维及瘢痕纤维组织所完全包绕,是一种罕见而危险的异位妊娠。胚胎着床于瘢痕部位可发生底蜕膜缺损,滋养细胞可侵入子宫肌层生长,绒毛与子宫肌层粘连、植入甚至穿透子宫壁,随着妊娠进展可导致子宫破裂及大出血。因此, Cesarean scar pregnancy (CSP) is a fertilized egg that is planted in the scar of the incisional cesarean section and is completely surrounded by uterine muscle fiber and scar tissue, a rare Dangerous ectopic pregnancy. Embryo implantation in the scar site may occur at the end decidua defect, trophoblast cells can invade the growth of the myometrium, villi and myometrial adhesions, implantation or even penetrate the uterine wall, with the progress of pregnancy can lead to uterine rupture and bleeding. therefore,