Objective :To investigate the effects with chorionic nature in twin pregnancy and pregnancy complications .Methods :102 cases with twins were retrospectively analyzed .According to chorionic nature ,cases were divided into two groups :observation group (monochorionic) and control group (double chorion) .Results :There were no difference in gestational hypertension ,intrahepatic cholestasis of pregnancy ,polyhydramnios ,prema-ture rupture of membranes and preterm birth rate between Observation group and control group .But compared with observation group ,the rat of neonatal asphyxia and perinatal mortality in control group was significantly higher . Conclusions :Compared with double chorion twin pregnancies ,monochorionic twin pregnancies has a higher risk .It should be accurately determine about the chorionic nature ,to improve the level of care in monochorionic twin preg-nancies .%目的：探讨双胎妊娠绒毛膜性质对孕妇妊娠期并发症及围生儿预后的影响。方法：选取定期产检并分娩的双胎产妇102例，根据双胎绒毛膜性质分为观察组（单绒毛膜）和对照组（双绒毛膜），分析两组孕妇妊娠期并发症发生率及围生儿预后情况。结果：观察组妊娠期高血压、妊娠期肝内胆汁淤积症、羊水过多、胎膜早破、早产发生率与对照组比较无明显差异。新生儿窒息发生率、围生儿病死率均显著高于对照组。结论：单绒毛膜双胎妊娠比双绒毛膜双胎妊娠对围生儿具有更高的危险，故在孕早期应及时对双胎妊娠孕妇的绒毛膜性质进行准确判断，提高对单绒毛膜双胎妊娠孕妇和胎儿的整体监护水平。
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