天气预报 > 其他 > B超多少天可以看孕囊
B超多少天可以看孕囊
更新时间: 2020-11-04 00:00:00  

B超35天左右可以看孕囊,孕囊是怀孕最初的形态,是原始的胎盘组织被羊膜、血管网包裹的小胚胎。一开始孕囊是很细小的,然后再慢慢地长大。一般情况下,怀孕5周以后,B超可看见小胎囊,胎囊约占宫腔不到1/4,或可见胎芽。

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