天气预报 > 其他 > 胎儿一般多少周会自动换成头位
胎儿一般多少周会自动换成头位
更新时间: 2020-11-04 00:00:00  

胎儿一般在30周左右自行转为头位。一般正常的话宝宝6、7个月以后开始慢慢的胎头下降成头位。头部在孕育的过程中,发育最快,所以,胎儿的头位在不断的变化。8周-11周:(胚胎刚刚发育-发育完成)头位较正。12周(3个月)-16周:(胎儿的身体,体重迅速上涨)胎儿头位开始向前倾。5个月(17周-20周):胎儿的头位前倾幅度更大。7个月:胎儿的头位以基本朝向下方。9个月-38周:(胎儿基本上完成了发育)胎儿的头位以完全朝向下方(已经准备出生了)。

关键词: 胎儿 一般 多少 自动

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