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怀双胞胎256天是多少周
更新时间: 2020-11-05 00:00:00  

怀双胞胎256天是怀孕36周建议定期到医院产检,已经要到达预产期的时间。

双胞胎,指胎生动物一次怀胎生下两个个体的情况。双胞胎一般可分为同卵双胞胎和异卵双胞胎两类。在人类社会,全世界双胞胎平均出生率为1∶89。同卵双胞胎指两个胎儿由一个受精卵发育而成,异卵双胞胎是由不同的受精卵发育而成的。(即平均每89个孕妇妊娠,会有一个孕妇生出双胞胎。)

关键词: 双胞胎 多少

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