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孕多少周胎位才会固定
更新时间: 2020-11-05 00:00:00  

怀孕胎位一般在30-32周就固定了。怀孕30周后胎儿在子宫内活动空间小了,胎位就固定了。正常的胎位为枕左前和枕右前位。胎儿的纵轴与母体的长轴一致,胎头在下方,骨盆入口的部位,胎头屈曲,以胎头的枕部为胎体的最低部位。双手交叉屈曲于胸前,双腿交叉弯曲于胸腹前方,胎儿以屈曲的姿势可以以最小的径线通过骨盆,而使阴道分娩能够顺利进行。

关键词: 多少 胎位 固定

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