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七个月双顶径多少
更新时间: 2020-11-04 00:00:00  

怀孕七个月也就是28周,双顶径平均值为7.1厘米。怀孕不足28周,体重不足1000克就是流产。怀孕达到或者超过28周就属于妊娠晚期。在怀孕28周时,胎儿的身长约35厘米,顶臀长25厘米,体重约1000克,此时胎儿的皮下脂肪不多,皮肤呈粉红色,表面覆盖着胎脂,瞳孔膜消失,眼睛半张开。四肢活动好,有呼吸运动,出生后可以存活,但是容易患特发性呼吸窘迫综合征。

关键词: 多少

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