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If a young man's low testosterone is a problem for a couple trying to get pregnant , gonadotropin injections may be an option in some cases. These are hormones that signal the body to produce more testosterone. This may increase the sperm count. Hedges also describes implantable testosterone pellets, a relatively new form of treatment in which several pellets are placed under the skin of the buttocks, where they release testosterone over the course of about three to four months. Injections and nasal gels may be other options for some men.
Prior to this study, competition and aggression were believed to be the natural boosters of testosterone levels, but now researchers may begin to examine the sex hormone’s roll in the male body. "By focusing so much on the role of testosterone in aggression and competition, we have missed out on the importance of testosterone in a variety of other tasks," said Trumble, reports ABC Science . For Tsimane men in Bolivia, environment plays a bigger role in hormone behavior because they have a lifestyle that requires them to cultivate their own food. The spikes in testosterone levels enhance muscle performance, which improves their ability to cut trees and get food for their families.