Studies: Fatherhood appears to result in hormonal changes

USA Today reported, “A study published last fall in Proceedings of the National Academy of Sciences found a drop in levels of testosterone, a hormone associated with masculinity, when men became first-time fathers.”

What’s more, “co-author Lee Gettler of Northwestern University in Evanston, Ill., also looked at the hormone prolactin in 289 participants; his study last month in the American Journal of Physical Anthropology found fathers have higher levels than others.”

Finally, “a smaller study at the University of Zurich in Switzerland, published earlier this year in the journal Hormones and Behavior, found that after men had children, they had lower testosterone levels and low scores for sensation-seeking.”

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