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Abstract
This study was conducted to evaluate the effect of the electrostatic potentials generated on the surface of the scrotal area when different types of textile fabric were worn. Twenty-one healthy volunteers were divided into three equal groups. The first group was dressed in underpants made of 100% polyester, the second wore underpants of 100% cotton, and the third wore a 50/50% polyester/cotton mixture. With an electrostatic kilovoltmeter, the electrostatic potentials were measured 1 h after wearing the pants once during the day and a second time at night. The test was repeated 4 times, each on a separate day. No electrostatic potentials were detected on the cotton underpants. The polyester pants showed the highest potentials (mean 338.9 ± 25 SD V/cnr), while the mixed polyester/cotton pants produced less than half that level (mean 148.3 ± 16 SD V/cm2). The readings during the day were higher than those at night, probably due to the higher temperature during the day. This study could explain the cause of diminished spermatogenesis in dogs dressed in polyester pants. A new theory is put forward holding that the polyester underpants create an “electrostatic field” across the scrotal sac that disturbs the testicular and/or epididymal function.