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50天胎儿胎心多少正常
更新时间: 2020-11-05 00:00:00  

50天胎儿胎心正常是60-80次左右,一般怀孕三四周,胎儿的心脏就开始跳动了,但是一开始是比较慢的。妊娠8周后,胎心跳动每分钟能达到180次左右,妊娠14周以后,胎儿的心跳速度下降为每分钟140次,以后保持在每分钟120-160次。

关键词: 胎儿 多少 正常

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