库扎瓦解释到：“之前的研究也显示，大部分的父亲睾丸激素水平低于单身无子女的男性，但都没有提及初始睾丸激素水平较低的男性是否更容易维持一段稳定的感情和生育子女，而新的研究结果证实事实并非如此。

Previous studies have shown that fathers in general have lower testosterone levels than single men without children.

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在接下来的5年中，无子女的男性由于年龄原因，睾丸素平均减少了14%，而那些成为父亲的男性，他们的睾丸素锐减了34%。

Over the next five years, childless men saw an average age-related testosterone decline of 14 percent, but for those who became fathers, the typical drop was 34 percent.

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