多胎妊娠的发生率在过去的30年内急剧增加,对母亲和胎儿有一定的风险。母亲可出现早产、需手术分娩、子痫前期等;胎儿出现发育不成熟、宫内发育迟缓(IUGR)和畸形。因此导致围产期疾病发病率和死亡率的增高。在含单绒毛膜囊的多胎妊娠中会合并一种特殊的并发症。因为共有一个胎 The incidence of multiple pregnancies has increased dramatically in the past 30 years, with some risks for mothers and fetuses. Mothers may have premature delivery, requiring surgical delivery, preeclampsia, etc .; fetal immaturity, intrauterine growth retardation (IUGR) and deformity. This has led to an increase in the incidence and mortality of perinatal diseases. A single complication occurs in multiple pregnancy with a single choriocapillaris. Because there is a total of one child