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一般胎芽一天长多少
更新时间: 2020-11-05 00:00:00  

胎芽一般每天增长约2毫米,大概在怀孕后6-7周可见胎芽和原始胎心搏动(最初的心跳)。

胎芽是指在受精卵发育过程中,最初两周称为孕卵。以后各种器官逐渐形成,在孕8周以前的胚胎。妊娠三至妊娠第一个月四周称为胎芽期。

关键词: 一般 天长 多少

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