天气预报 > 其他 > 胎儿12周头臀长是多少
胎儿12周头臀长是多少
更新时间: 2020-11-05 00:00:00  

怀孕12周胎儿头臀一般在9厘米左右是正常的,这也与父母的遗传有一定的影响。

头臀长是指胎儿从颅顶顶部到臀部外缘的距离,一般怀孕7-12周左右测量,孕12周的胎儿头臀长为5.5cm超声检查早孕胎儿时,常用顶臀径估测胎儿的孕龄,此为最为准确的估测方法,6周初由于胚芽太小,测量不准确,随着孕周的增大,胚胎的生长,其形态曲线为C形,头端相对较大而容易辨认。

关键词: 胎儿 多少

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