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早产儿多少天算正常
更新时间: 2020-11-04 00:00:00  

早产儿定义为胎龄小于37周,也就是259天的新生儿,但不论其出生体重,绝大部分的早产儿体重小于2500克,身高小于45公分,其身体各器官的构建和生理功能呈现出不同程度的不成熟。发生早产的原因仍未完全阐明,孕母的因素常常起着重要的作用,如妊娠并发肝病早产率为20%,并发肾病早产率为23.3%,并发妊高症、心脏疾患等,早产率亦有明显的升高。

关键词: 早产儿 多少 正常

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