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怎么计算怀孕天数
更新时间: 2021-03-18 08:43:42  

1.普通算法:以最后来月经那天开始算,预产期是从最后来月经那天开始算+280天。

2.胎动计算:依据胎动日期来推算,胎动开始于怀孕后的18周至20周,即初产妇的胎动日+20周。

3.经产妇是胎动日+22周。孕吐推算:孕吐反应一般出现在怀孕六周末,就是末次月经后42天,由此向后推算至280天,即为预产期。

关键词: 怎么 计算 怀孕 天数

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