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胎盘离宫颈口多少厘米
更新时间: 2020-11-04 00:00:00  

胎盘边缘距离宫颈内口要在2.5厘米以上,如果在2.5厘米之内,称为低置胎盘。如果覆盖宫颈内口,称为前置胎盘。低置胎盘和前置胎盘都是很危险的情况,容易造成产前、产时和产后的大出血,一定要小心。但这种情况不是固定不变的,孕28周之前的胎盘位置低,有时到孕晚期可以拉到正常位置。因为随着子宫增大宫底不断抬升,有时胎盘会被拉到正常位置。

关键词: 胎盘 宫颈 多少 厘米

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