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14周加5是多少天
更新时间: 2020-11-05 00:00:00  

14周加5是3个月零19天。一般医院喜欢用周数来计算胎龄,七天一周,四周算一个月,总共40周。

胎龄指从卵细胞和精子结合成受精卵到胎儿自母体中分娩出来的这段时间。从孕妇末次月经的第一天算起,至胎儿分娩出约40周。胚胎学家则从受精卵之日为起点,计算受精龄。受精一般发生在末次月经第一天之后的2周左右,故从受精到胎儿分娩出约38周。

关键词: 多少

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