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New research study reveals biological changes in men when they become fathers

In a recent study in Proceedings of the National Academy of Sciences it appears male testosterone levels are lowered after the birth of a child. It appears, as men spend more time caring for their children, their levels of testosterone decrease. From my reading of the article it appears that a reduction in our testosterone allows us to be less aggressive and more emotionally available to form attachments with our children. 

Peter Ellison, a professor of human evolutionary biology at Harvard University commented on the study, “The real take-home message is that male parental care is important. It’s important enough that it’s actually shaped the physiology of men.”

For a short synopsis of the study read Pam Belluck from the NY Times published September 12th, 2011.