天气预报 > 其他 > 怀孕9个月头围正常值是多少
怀孕9个月头围正常值是多少
更新时间: 2020-11-04 00:00:00  

怀孕九个月的胎儿头围大约是319mm。胎儿头围是指绕胎头一周的最大长度。胎儿的头部从前面到后面最长的部分,通常情况下是从前额的鼻根”到后脑的枕骨隆突”的距离最长,所以一般头围就是从前额的鼻根”到后脑的枕骨隆突”绕一周的长度。胎儿头围在正常范围内时一般问题不大,B超的数据毕竟和实际是有些出入的,胎儿不同的姿势也会影响到B超数据。

关键词: 怀孕 正常值 多少

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