Sperm count may be good predictor of men’s overall health, from Harvard Men’s Health Watch
Between 1963 and 2001, the Copenhagen Sperm Analysis Laboratory performed semen analyses on 51,543 men, most of whom were referred because they or their partners had concerns about fertility. The results showed a clear link between semen quality and the rate of death. As the number of sperm increased up to a threshold of 40 million per milliliter of semen, the mortality rate declined steadily; the men with the highest sperm counts enjoyed a mortality rate 43% lower than the men with the lowest counts.
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