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胎心21周多少正常
更新时间: 2020-11-04 00:00:00  

胎心21周正常范围是120--160次/分,时还要快些,也不太规律,到怀孕末期就规律多了。

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。胎儿正常的胎心率为110~160次/分,正常的胎儿心率随子宫内环境的不同,时刻发生着变化,胎心率的变化是中枢神经系统正常调节机能的表现,也是胎儿在子宫内状态良好的表现。若胎心率分或>160次/分,持续10分钟以上,称为胎心过缓或胎心过速。

关键词: 多少 正常

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