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孕妇通常被建议补铁，以防止怀孕期间常见的“缺铁性贫血”，而一项最新的 Nature 研究显示，孕期缺铁的可能会对胎儿的性别发育产生深远影响——孕期小鼠缺铁，竟会导致性染色体为 XY 的小鼠胚胎发育出卵巢！
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