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A 33-year-old male asked:

Does heavy marijuana use over a long time lead to sterility in men? or do sperm go back to normal when it's stopped?

2 doctor answers2 doctors weighed in
Dr. Florence Nwofor
Specializes in Pediatrics
Yes.: Cannabis use decreases secretion of testosterone, decreases desire for sex and leads to impotence and gynecomastia. It also decreases sperm count and motility. Changes in semen seen with heavy cannabis smoking may cause increased infertility. It is unclear if these effects are reversible. It will be best to stop now for this & other undesirable effects of abuse of marijuana. Take care & be saf
Dr. Gerardo Guerra Bonilla
Family Medicine 12 years experience
Marijuana: Cannabis use suppresses secretion of testosterone in men, which may decrease libido and lead to impotence and gynecomastia. Cannabis use also causes decreased sperm count and motility. Changes in semen characteristics seen with heavy cannabis smoking may cause increased infertility.

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Last updated May 27, 2016
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