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胚胎离宫颈口多少厘米
更新时间: 2020-11-05 00:00:00  

胎儿离宫颈口应该是在7厘米以上为正常。如果小于7厘米,胎盘可能低。前置胎盘通常在怀孕28周后确定。前置胎盘主要是由于胎盘位置低,部分或完全覆盖宫颈。典型症状是无痛性阴道出血。正常情况下,胎盘下缘到宫颈的距离应该是3到7厘米。

关键词: 胚胎 宫颈 多少 厘米

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