A new study from Spain found significant regional differences in sperm quality, with men in the highest-performing region having nearly twice the total motile sperm count of those in the lowest-performing region. Surprisingly, lifestyle factors such as diet, smoking, alcohol use, and physical activity were similar across all regions and did not explain the differences. Researchers suggest that environmental factors, including air pollution and exposure to industrial chemicals, may play a larger role in male fertility than previously thought. While larger studies are needed, the findings highlight the importance of reducing environmental pollution to help protect reproductive health.
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