妊娠达到或超过42孕周(≥294天)者称为过期妊娠,属于病理妊娠的一种。其发生率约占妊娠总数的5~12%。过期妊娠的胎儿围产病率和死亡率增高,并随妊娠延长而加剧,妊娠43周时围产儿死亡率为正常3倍。44周时为正常5倍。初产妇过期妊娠胎儿较经产妇者危险性增加。目前已被医疗界广泛重视。有学者统计,在我国过期妊娠的发生率为8.16%~11.7%。本文从发病因素、病理改变、对母儿的影响、处理等方面浅谈过期妊娠的发现和临床处理。 Pregnancy reached or exceeded 42 gestational weeks (≥294 days), known as expired pregnancy, is a kind of pathological pregnancy. The incidence of about 5 ~ 12% of the total number of pregnancies. Perinatal pregnancies increased perinatal morbidity and mortality and were exacerbated by prolonged pregnancies, with a perinatal mortality rate of 3-fold at 43 weeks gestation. 44 weeks to normal 5 times. The primiparous fetus is more dangerous than the mothers. Has been widely regarded by the medical profession. Some scholars statistics, the incidence of overdue pregnancy in China 8.16% ~ 11.7%. This article from the incidence of factors, pathological changes, the impact on the mother and child, dealing with the discovery and clinical treatment of overdue pregnancy.