Smoking pot more than once a week 'lowers sperm count by a third - and adding cocaine and ecstasy to the mix cuts it by half'

02 Sept 2015

Writing in the American Journal of Epidemiology, Danish researchers found that smoking marijuana more than once a week was linked to a 29 per cent lower total sperm count compared to those who smoked the drug less frequently or not at all. Men who took it with other recreational drugs such as cocaine and ecstasy saw sperm count fall by 55%.