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怀孕50天胚芽大小多少正常
更新时间: 2020-11-05 00:00:00  

怀孕50天,胎芽大小21mm,有原始心管搏动的话,是发育正常的。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: 怀孕 大小 多少 正常

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