First off- Some studies suggest that cannabis use may make your sperm hyperactive. (No, I'm not kidding.) But, I never noticed a shortage of hippie babies! Sperm from marijuana smokers move too fast too early, impairing fertility, UB research shows: The Hempire - [cannabis, uk]

Second - If your testosterone levels are normal, things are OK as a rule. Cannabis does not affect hormone levels (which means you won't grow manboobs, either!). University of Iowa Anesthesia Publications

Third, if you are a tobacco smoker, cannabinoids may INCREASE your fertility if you are male! Sensi > Cannabis Forum: Synthetic Cannabinoid May Aid Fertility In Smokers

Guess you get to figure it out! 3 studies saying different things! Take your choice!- Granny:hippy: