胎盘距离宫口多少正常

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快速问医生

病情分析：胎盘距离宫颈口一般要求7cm以上，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，就不提示前置胎盘。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

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