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一种普通的寄生虫会影响到全球人口性别比例。根据最近研究报道,怀孕的妇女如果存在潜在的鼠弓形虫(Toxoplasma gondii)感染,则其生男孩的几率明显大于生女孩的几率。
An ordinary parasite affects the sex ratio of the global population. According to recent reports, pregnant women who have a potential infection with Toxoplasma gondii have a significantly higher chance of having a baby than having a baby.