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怀孕多少天有胎牙
更新时间: 2020-11-05 00:00:00  

一般在妊娠6-7周时,B超可以看见胎芽及胎心。因为胚胎的发育过程一般是30-40天形成胎囊,40-50天形成胎芽,50-60天形成胎心,所以B超一般建议在60天左右进行,可看到胎囊,胎芽和胎心。

处于胎芽时期的胎儿仍是十分不稳定的状态,此时任何剧烈的运动或刺激都可能会导致其从宫壁脱落下来,导致胚胎死亡或胚胎停育。

关键词: 怀孕 多少

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