围产儿死亡率是衡量围产保健质量的重要效果指标,降低围产儿死亡率已经成为妇幼卫生工作的主要任务而为世界各国所重视。统计围产儿死亡率的时限取决于围产期的定义,我国围产期定于从妊娠28周至产后1周(即胎儿体质量达到或超过1000g或身长达到35cm)。近20 Perinatal mortality is a measure of the quality of perinatal care, an important indicator of the effectiveness of reducing perinatal mortality has become the main task of maternal and child health work for all countries in the world attention. The timing of perinatal mortality is based on the definition of perinatal period. The period of perinatal period in China is from 28 weeks of gestation to 1 week of postpartum (ie, the fetal mass reaches or exceeds 1000g or the length reaches 35cm). Nearly 20