perinatal morbidity and mortality围产期发病率和死亡率 decrease the incidence of a disease减少某疾病的发病率 ..
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perinatal mortality and morbidity 围产儿发病率和死亡率
Preterm birth is the leading cause of 75% perinatal morbidity and mortality.
据报导围生儿死亡与患病中的75%与早产有关。
Preterm labor is the important factors leading perinatal morbidity and mortality.
结论：早产与多种因素有关，早产是新生儿发病和死亡的重要原因；
Infections during pregnancy confers increased risk of maternal and perinatal morbidity and mortality.
孕期中的感染，增加母体与生产前后发病率与死亡率的风险。
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