The widely held view that sperm counts in men are dropping around the world may be wrong, according to a new study by University of Manchester, Queen’s University in Kingston, Canada and Cryos International, Denmark.
Jun 8 2024University of Manchester
In the new study, however, statistical analysis of sperm samples provided by the men applying to be sperm donors showed that while the average sperm concentration varied from year to year, it did not change significantly over a six-year period. “This is to some degree the result of meta-analysis published by Levine et al. which proposed that sperm concentrations worldwide had declined as much as 2.64% per year in unselected men since the year 2000.
Co-author Professor Robert Montgomerie said: “The decline in measures of sperm motility between 2019 and 2022 was an unexpected finding.“While there is no evidence to suggest that the SARS-CoV-2 virus is directly affecting sperm, we speculate whether the widespread lockdowns may have led to changes in working pattens, diet, and levels of physical activity which we already know can impact sperm motility.
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