天气预报 > 其他 > 胎儿有原始脉动大约在多少天
胎儿有原始脉动大约在多少天
更新时间: 2020-11-05 00:00:00  

妊娠5-6周时,就可以在阴道B超或腹部B超检查下见到胎儿有原始脉动。

妊娠7-8周后B超可见到明显的胎心跳动,此时可用M超测量心率和观察心律,心脏大小约2mm。

关键词: 胎儿 原始 大约 多少

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