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31周胎儿腿多少才正常
更新时间: 2020-11-04 00:00:00  

怀孕31周,胎儿的股骨长6.03厘米是正常值,低于这个值可能缺钙。

缺钙指的是人体内钙缺乏的状态。钙的摄入不足、吸收不良、消耗过多或代谢紊乱等原因,会导致维持人体正常生理功能所需的钙缺乏,可能引起骨质疏松、肌肉痉挛等症状,严重者则可能导致心脏衰竭。

关键词: 胎儿 多少 正常

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