天气预报 > 其他 > 胚胎着床需要多少天
胚胎着床需要多少天
更新时间: 2020-11-04 00:00:00  

胚胎着床需要11—12天。胚胎是怀孕最初两个月内的幼体。囊胚、胚的早期发育和胚胎发育是一个连续过程。卵子在受精后的2周内称孕卵或受精卵;受精后的第3~8周称为胚胎。从一个受精卵发育成为一个新个体,要经历一系列非常复杂的变化,这里只能简要地介绍胚胎发育的情况。

关键词: 胚胎 需要 多少

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