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孕多少天可以b超查出胎心
更新时间: 2020-11-04 00:00:00  

孕50-60天b超可查出胎心,孕30—40天b超可查出胎囊,孕40—50天b超可查出胎芽。胎心即胎儿的心跳,反映胎儿在宫内状态,当各种原因引起胎儿缺氧时,胎心很敏感地会出现变化。

关键词: 多少 可以 查出

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