Testosterone Drops Steeply After Baby Arrives
Fathers Wired to Provide Offspring Care
A new Northwestern University study provides compelling evidence that human males are biologically wired to care for their offspring, conclusively showing for the first time that fatherhood lowers a man’s testosterone levels.
The effect is consistent with what is observed in many other species in which males help take care of dependent offspring. Testosterone boosts behaviors and other traits that help a male compete for a mate. After they succeed and become fathers, "mating-related" activities may conflict with the responsibilities of fatherhood, making it advantageous for the body to reduce production of the hormone.
Human males are biologically wired to care for their offspring, new research confirms. (Credit: © Melissa Schalke / Fotolia)