Testosterone Decline Aids Men Do Dad-Duties

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Males experience a decline in the supply of testosterone after their children have been born and this is an event which one study proved to be an important aid for these men to take on the challenges of caring for their kids. The research was conducted in the Proceedings of the National Academy of Sciences.

Testosterone is the male hormone which promotes male sexuality, both primary and secondary. It also gives way to a man’s physical robustness, aggression and is typically bountiful in young and single men without any children.

The study was able to find out that the lesser amount of testosterone in their veins lead the fathers to adopt a fatherly character and help their wives in caring for their children. The need for parental care and nurturing is something unique among human beings and this need is much longer among humans in childhood than any other mammals. Says Christopher Kuzawa, co-author of the study and also from the Northwestern University of Illinois, “Raising human offspring is such an effort that it is cooperative by necessity, and our study shows that human fathers are biologically wired to help with the job.”

The study was conducted among fathers in the Philippines aging from 21 to 26 years old. The research involved about 624 men who were tracked for a span of five years. Within the five year interim, these men entered marital relationships and became fathers. At the start of the study, those who were initially single and became fathers at the end of the study, the men with the highest amounts of testosterone were more likely to take on daddy roles.

The characteristic of these fathers is important because prior studies were not able to delineate and ascertain whether the decline in the levels of testosterone brought about their inclination to marry or is just a mere result of entering a married life.

According to Lee Gettler, a candidate for Doctoral studies in the same university stated that “The men who started with high testosterone were more likely to become fathers, but once they did, their testosterone went down substantially. Our findings suggest that this is especially true for fathers who become the most involved with child care.”

The male subjects who became fathers in the course of the study established a median score of 26 to 34% drop in the levels of testosterone. This has a significant difference compared to non-fathers who were single who recorded an average drop of 12 to 14%.

The greatest declines in the amount of testosterone have been observed among men who fathered newborns, one month old kids or younger infants. According to Gettler, “Fatherhood and the demands of having a newborn baby require many emotional, psychological and physical adjustments. Our study indicates that a man’s biology can change substantially to help meet those demands.”




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