4、增加医生检查次数和早产药物的使用率,但其早产率无差异。(Ⅰa/Ⅱa)(Reichmann JP. Home uterine activity monitoring: an evidence review of its utility in multiple gestations. JReprodMed. 2009 Sep;54(9):559-62.Colton T,KayneHL, Zhang Y, Ametaanalysisof home uterine activity monitoring. Am JObstetGynecol. 1995 Nov;173(5):1499-505.D
5、yson DC,DanbeKH,BamberJA, Monitoring women at risk for preterm labor. NEnglJ Med. 1998 Jan 1;338(1):15-9.)问题8:宫颈环扎可以预防双胎妊娠早产的发生?推荐无证据表明宫颈环扎术能避免双胎妊娠早产的发生(B)176例双胎,其中76例宫颈环扎手术,结果显示宫颈环扎手术与分娩孕周并无明显相关关系。而既往早产史孕妇可以进行选择性宫颈环扎手术会改善妊娠结局。(Miller,E.S,P.VRajanandw.A.Grobman,Outcomesafterphysicalexamination-in