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孕16周胎盘离宫颈口多少正常
更新时间: 2020-11-04 00:00:00  

孕16周胎盘离宫颈口7cm以上才算正常,5cm是相对安全的范围。现在B超检查胎盘只要距离宫颈口有2cm以上,就不再报(确诊)前置胎盘。前置胎盘最主要的风险,是可能出现到孕晚期无痛性阴道流血,胎宝宝在没有分娩之前就出现胎盘的剥离出血。所以,如果胎盘距离宫颈内口较近,或者覆盖遮挡宫颈内口,叫前置胎盘。前置胎盘的胎宝宝有可能到不了足月,会出现早产的情况。

关键词: 胎盘 宫颈 多少 正常

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