目的分析过期妊娠对围产儿的影响。方法对2008-01-2010-12在张家口市妇幼保健院分娩的6 349例产妇中诊断为过期妊娠的420例产妇,将其妊娠结局与同期按1∶1比例随机抽取的足月单胎妊娠420例产妇的妊娠结局进行比较。结果过期妊娠组的剖宫产率、巨大儿发生率及胎儿窘迫、新生儿窒息、围产儿病死率明显高于对照组。结论过期妊娠对母儿危害大,应对过期妊娠采取干预措施,普及孕期保健知识,让孕妇及其家属懂得妊娠期检查的重要性,适时终止妊娠,降低围产儿的并发症及病死率。 Objective To analyze the effect of overdue pregnancy on perinatal children. Methods A total of 420 maternal women diagnosed as overdue pregnancy among 6 349 mothers giving birth in Zhangjiakou Maternal and Child Health Hospital from January 2008 to October 2010 were enrolled and their pregnancy outcome was compared with that of the full-term singleton pregnancy 420 maternal pregnancy outcomes were compared. Results Cesarean section rate, macrosomia and fetal distress, neonatal asphyxia and perinatal mortality in outdated pregnancy group were significantly higher than those in control group. Conclusions Out-of-phase pregnancy is more harmful to mothers and children. Intervention measures should be taken to prevent outdated pregnancy. Pregnancy and their families should be aware of the importance of pregnancy testing and timely termination of pregnancy to reduce perinatal complications and mortality.