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孕七个月双顶经是多少正常
更新时间: 2020-11-04 00:00:00  

孕七个月双顶经正常值在27厘米的范围,正常情况下从21周开始每周平均增长1cm。

双顶径(biparietaldiameter,BPD),医学名词,又称胎头双顶径,是指胎儿头部左右两侧之间最宽部位的长度,又称为"头部大横径"。B超测量BPD>8.5示胎成熟。

关键词: 多少 正常

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