这类妊娠中约10%是过期妊娠。
过期妊娠也易出现产时胎儿窒息。
Intrapartum asphyxia is also more common in the postdates pregnancy.
过期妊娠需排外巨大儿的发生。
过期妊娠常因脐带受压出现变异减速。
Variable decelerations representing cord compression are frequently seen in postdates pregnancies.
过期妊娠；新生儿窒息；围生儿死亡。
Postterm pregnancy; Neonatal asphyxia; Death of perinatal period.
目的：探讨过期妊娠对母体的危害及胎儿预后的影响。
Objective: to investigate prolonged pregnancy's harm to the mother and effects on the fetus prognosis.
巨大儿的好发因素包括母亲糖尿病，过期妊娠及肥胖。
Causal factors of macrosomia include maternal diabetes, postdates gestation, and obesity.
目的探讨过期妊娠对母婴的影响，寻求正确的处理方法，降低围生儿病率。
Objective to investigate the effects of prolonged pregnancy on mothers and infants and to seek for the correct method to decrease perinatal disease incidence.
过期妊娠剖宫产率偏高，宫内窘迫、头盆不称、引产失败是其主要适应证。
Cesarean section rate was increased, and major indications were fetal distress, cephalo-pelvic disproportion and failure in induction of labor.
过期妊娠组剖宫产率、新生儿重度窒息率、产后出血率明显高于足月妊娠组。
Expired pregnancy group cesarean section rate, newborns severe suffocation rate, the rate of postpartum hemorrhage significantly higher than full-term pregnancy group.
妊娠周虽然不是过期妊娠，但妊娠周后分娩较足月分娩的围产儿死亡率明显增加。
Even weeks gestation is not pregnancy prolongation, but the perinatal mortality rate of is higher in partus after weeks gestation than in due partus.
妊娠41周虽然不是过期妊娠，但妊娠41周后分娩较足月分娩的围产儿死亡率明显增加。
Even 41 weeks gestation is not pregnancy prolongation, but the perinatal mortality rate of is higher in partus after 41 weeks gestation than in due partus.
正常妊娠、过期妊娠与妊高征三组孕妇血清铜高于胎儿。正常妊娠、过期妊娠胎儿血清铁高于孕妇。
Copper level in serum of normal, prolonged and hypertensive pregnant women was higher than that of fetal infants, while Iron level of normal and prolonged pregnant women was lower.
结果过期妊娠的剖宫产率是足月妊娠的1.6倍，产后出血是对照组的3.3倍，新生儿窒息，新生儿胎粪吸入综合征的发生率增加。
Results The C-sect rate of post-term pregnancy is 1.6 times of uterogestation, postpartum hemorrhage is 3.3 times of controls, neonatal asphyxia and newborn meconium inhalation rate will increase.
结果过期妊娠的剖宫产率是足月妊娠的1.6倍，产后出血是对照组的3.3倍，新生儿窒息，新生儿胎粪吸入综合征的发生率增加。
Results The C-sect rate of post-term pregnancy is 1.6 times of uterogestation, postpartum hemorrhage is 3.3 times of controls, neonatal asphyxia and newborn meconium inhalation rate will increase.
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