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二胎孕多少周胎儿往下走

更新时间: 2020-11-04 00:00:00     

一般怀孕36周胎儿可能会往下走,也就是入盆。第一次生育,胎头入盆的时间一般在36周左右,经产妇往往都要到临产前后才进入骨盆。

入盆是指在妊娠晚期,胎儿在羊水和胎膜的包围中,以头朝下、臀朝上、全身蜷缩的姿势,使其头部通过母体的骨盆入口进入骨盆腔,从而其身体的位置得到巩固。当胎儿入盆时,不少孕妇常会感到腹部阵阵发紧和有坠痛感。胎儿入盆后更加压迫到膀胱,导致尿频的症状更加明显,同时水肿、便秘及腰腿痛等症状也会加重。

关键词: 多少 胎儿

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