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b超停经多少天能做出来是否怀孕
更新时间: 2020-11-04 00:00:00  

正常情况下,怀孕5周(35天)B超可以探及孕囊,孕6-7周(42-49天)可以探及原始心管搏动。

妊娠是指胚胎或胎儿在哺乳类雌性体内孕育成长的过程。人类妊娠全过程共分为3个时期:妊娠12周末以前称早期妊娠;第13—27周末称中期妊娠;第28周及其后称晚期妊娠。

关键词: 多少 做出 是否 怀孕

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