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孕多少周胎听力发育期
更新时间: 2020-11-05 00:00:00  

一般15-20周胎儿开始有听觉,但对外界的声音不敏感,24-28周对音响刺激已具有充分的反应能力,并以4种方式表达,即胎动、胎心率、脑电波记录的改变及电流性皮肤反射的反应。

关键词: 多少 听力 发育期

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