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一般多少天能有卵黄囊

更新时间: 2020-11-04 00:00:00     

一般在六周左右B超就可以见到卵黄囊,在七周左右就可以发现胎心搏动的。卵黄囊是怀孕期间必不可少的一种物质,而且卵黄囊可以给胎儿提供必要的生长条件,让胎怀孕儿在母体里面健康的发育。胚胎发生体褶后,原肠会明显地分成胚内的原肠和胚外的卵黄囊。

关键词: 一般 多少 卵黄

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