Do potheads make more babies than non-potheads? Maybe.
According to a new Harvard study , men who smoke more weed have HIGHER sperm counts. But they also say that men who smoke weed engage in riskier behavior, which leads to higher levels of testosterone, which could be skewing the results. Here's a news report, where the reporter talks like a stoner.
Men who had ever smoked marijuana (N = 365) had significantly higher sperm concentration (62.7 (95% confidence interval: 56.0, 70.3) million/mL) than men who had never smoked marijuana (N = 297) (45.4 (38.6, 53.3) million/mL) after adjusting for potential confounders (P = 0.0003). There were no significant differences in sperm concentration between current (N = 74) (59.5 (47.3, 74.8) million/mL) and past marijuana smokers (N = 291) (63.5 (56.1, 72.0) million/mL; P = 0.60). A similar pattern was observed for total sperm count.