Men who smoke marijuana may have trouble becoming a father.
A new study out of England found the drug to increase a man's risk for fertility problems. Researchers recruited more than 2,000 men from 14 fertility clinics in England, and gave them questionnaires about their medical history and lifestyle habits.
The study found smoking marijuana may lead to the production of abnormal sperm - ultimately putting young men's fertility at risk.
Researchers stress that while the link is possible between marijuana and infertility, more studies are needed to reach a definitive conclusion.