2021 study in World Journal of Men's Health finds a 25% increase in average penis size and a 60% drop in sperm quality since 1992.

2021 study in World Journal of Men's Health reveals a 25% increase in average penis size (from 12.19 cm to 15.34 cm) since 1992, linked to sedentary lifestyles and hormone-disrupting substances. This increase coincides with a 60% drop in sperm quality due to genital defects, tumors, and decreased sperm count and testosterone levels. Researchers emphasize the need for further investigation to understand the implications of these changes.

August 15, 2024
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