异位妊娠是指受精卵在子宫体腔以外着床发育,是妇产科常见的急腹症之一。宫内宫外同时妊娠又称复合妊娠(heterotopic pregnancy,HP),是临床上罕见的病理妊娠,既往自然发生率约1/7000～1/30000[1],临床工作中极易漏诊、误诊。近年随着辅助生殖技术的开展,复合妊娠的发生率可高 Ectopic pregnancy refers to fertilized eggs implantation in the uterus outside the body cavity development, obstetrics and gynecology is one of the common acute abdomen. Intrauterine intrauterine pregnancy, also known as heterotopic pregnancy (heterotopic pregnancy, HP), is a clinically rare pathological pregnancy, the previous natural rate of about 1/7000 ~ 1/30000 [1], clinical work easily missed diagnosis, misdiagnosis. In recent years, with assisted reproductive technology, the incidence of multiple pregnancies can be high