A member 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?

A doctor has provided 1 answer

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.

Answered 5/16/2016

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