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孕十周顶臀长正常值是多少
更新时间: 2020-11-04 00:00:00  

孕十周顶臀长正常值是2.6CM左右,顶臀长是指胎儿从颅顶顶部到臀部外缘的距离。

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。故此采用以下公式计算妊娠龄。

关键词: 正常值 多少

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