What's behind a decrease in male fertility?

“Sperm counts have dropped over 40% over the last 60 years”, according to Dr. Sevann Helo, a Mayo Clinic urologist. What’s behind the dramatic decrease? Smoking, stress and environmental exposures as well as a man’s biological clock affect fertility.

What can a man do to increase and maintain fertility? The answer on this episode of Mayo Clinic Q&A.

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