Image content influences men's semen quality

  • Kilgallon S
  • Simmons L
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Abstract

There is increasing evidence from non-human animals that males adjust their ejaculate expenditure according to the risk of sperm competition. In this study we show that, after controlling for lifestyle factors known to influence semen quality, human males viewing images depicting sperm competition had a higher percentage of motile sperm in their ejaculates. Many lifestyle variables were confirmed to influence semen quality, including the recent suggestion that storage of mobile phones close to the testes can decrease semen quality.

Author-supplied keywords

  • Humans
  • Sperm competition
  • Sperm motility

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Authors

  • Sarah J. Kilgallon

  • Leigh W. Simmons

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