Healthcare News & Insights

Fatherhood lowers men’s testosterone levels

Testosterone levels take a steep drop after men become parents, according to a new study. And the more involved they are in child care, the lower it goes.

Researchers suspect the change is an evolutionary mechanism that helped men commit to care-taking duties for their families once their kids arrived.

To be clear, the drops are significant, but the changes men experience are subtle. As one researcher explained, the hormonal drop would make a man more mentally focused on the family group, but not portend a drop in libido or other physical changes.

More questions remain: For example, it’s not known if non-paternal male relatives living with a family group experience similar hormonal changes or how and when fluctuations occur.

The study was published in The Proceedings of the National Academy of Sciences.

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