Physically demanding work tied to higher male fertility, study suggests brighamwomens
Are occupational factors associated with markers of testicular function among men attending a fertility center?Men working non-daytime/rotating shifts and those with physically demanding jobs have higher sperm concentration and total sperm count as well as higher estradiol and total testosterone concentrations.
Men who reported often lifting or moving heavy objects at work had 46% higher sperm concentrations and 44% higher total counts compared with men who reported never lifting or moving heavy objects at work. Similar results were found for men working in rotating shifts compared to those in day shifts, as well as for men involved in heavy levels of physical exertion compared to those with light levels at work.
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