近年来,随着剖宫产率的不断升高,子宫瘢痕妊娠发病率也呈上升趋势。据报道剖宫产后瘢痕子宫妊娠发生率为0.045%,是异位妊娠中非常罕见的[1],,是剖宫产远期并发症之一,是子宫肌层妊娠中的一种特殊类型。由于剖宫产后瘢痕引起子宫内膜间质蜕膜缺乏或缺陷,导致受精卵在此处着床后常发生底蜕膜缺损,滋养层呈浸润性生长至子宫壁,甚 In recent years, with the rising rate of cesarean section, the incidence of uterine scar pregnancy also showed an upward trend. It is reported that the incidence of cesarean scar after uterine pregnancy 0.045%, is very rare in ectopic pregnancy [1], is one of the long-term complications of cesarean section, is a special type of pregnancy in the myometrium . Due to cesarean scar caused by lack or defect of endometrial stromal decidua, resulting in implantation of fertilized eggs often occur at the end decidua defect, trophoblast invasive growth to the uterine wall, and even