Previous research had shown that among new fathers, testosterone levels were lower than in men of the same age who didn't have children. (sciencemag.org)
The same coverage on the same car will cost a young woman less on average that it will a young man of the same age. (carinsurancequote.net)
Another finding in this study was that men with low T develop depression more often than men of the same age who have normal testosterone levels. (hghinjections.us)