Smoking small amounts of cannabis has been linked to a higher sperm count in men, new research has found.
According to a team at the Harvard T.H. Chan School of Public Health, men who had smoked marijuana had higher sperm concentration and count than men who had never inhaled. The men in the study reported smoking an average of two joints per week.
The results, published in the journal Human Reproduction, shocked the research team because they were “not consistent with a deleterious role of marijuana smoking on testicular function as initially hypothesized.”
The Harvard researchers collected 1,143 health surveys and semen samples from more than 650 men between the years of 2000 and 2017. All the men were seeking treatment at the Massachusetts General Hospital Fertility Center. On average, the subjects were 36 years old, white and college educated.