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一个成年人全身的血液大概有5000ml,女性还要更少,但在分娩后,产妇可能在24小时之内...

 5 years ago
source link: https://weibo.com/3949671123/GnFQ52Zmd
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一个成年人全身的血液大概有5000ml,女性还要更少,但在分娩后,产妇可能在24小时之内就失血500ml甚至1000ml以上——这就称为产后出血。人类几乎是唯一需要女性承受如此巨大的分娩风险的物种——而这追根究底,是因为几千万年前的一次“转基因”,使全人类的胎儿都“感染”了古老的病毒,而对母亲格外凶狠。

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