Fatherhood Decreases Testosterone Levels

Fatherhood Decreases Testosterone Levels
Testosterone drives men to chase women and have sex. High testosterone levels in young men make them preoccupied with sex. A study from Northwestern University showed that testosterone levels drop dramatically after men have children and assume the responsibility of raising a family. Researchers studied testosterone levels in more than 600 single, non-fathers in 2005 and again 4.5 years later after they became fathers. Fatherhood decreased testosterone levels by 26 percent during the day and 34 percent at night. Men who spent more time with their child had lower testosterone levels than men not involved in child care. The researchers concluded that high testosterone levels promoted mating success, while lower levels enhanced parenting. (Proceedings National Academy Of Sciences USA, published online)

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