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14周胎儿羊水多少mm

更新时间: 2020-11-05 00:00:00     

怀孕14周一般胎儿羊水深度在3-8厘米为正常,同时要定期的到医院进行参检的检查。

充满于羊膜腔内的液体称为羊水。羊水的来源、量和成分随孕周不同而有所变化。妊娠初期,羊水主要是母体血清通过胎盘进入羊膜腔的透析液,少量从胎盘表面和脐带表面渗出。当胎儿血循环形成后,胎儿体内水分和小分子可经尚未角化的胎儿皮肤渗出,构成羊水的一部分。妊娠11~14周时胎儿肾脏已有排泄功能,因此妊娠中期以后胎儿排出的尿液是羊水的重要来源。

关键词: 胎儿 羊水 多少 mm

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