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Smoking marijuana more than once a week may lower men's sperm counts by about a third, according to a new study.
Researchers found that the men in the study who smoked marijuana more than once a week had sperm counts that were 29 percent lower, on average, than those who did not smoke marijuana, or used the drug less frequently.
The researchers thought that amount of reduction in sperm count "was quite a lot," said study author Tina Kold Jensen, of the University of Copenhagen in Denmark.
They also found that the sperm concentrations (which is measured slightly differently than sperm count) were 28 percent lower in the men who smoked marijuana more than once a week.
It is not clear why marijuana use may decrease a man's sperm count and concentration, but it may have something to do with how THC — marijuana's psychoactive ingredient — interacts with certain receptors in the testes, the researchers said.
Read more here. (Live Science)
Researchers found that the men in the study who smoked marijuana more than once a week had sperm counts that were 29 percent lower, on average, than those who did not smoke marijuana, or used the drug less frequently.
The researchers thought that amount of reduction in sperm count "was quite a lot," said study author Tina Kold Jensen, of the University of Copenhagen in Denmark.
They also found that the sperm concentrations (which is measured slightly differently than sperm count) were 28 percent lower in the men who smoked marijuana more than once a week.
It is not clear why marijuana use may decrease a man's sperm count and concentration, but it may have something to do with how THC — marijuana's psychoactive ingredient — interacts with certain receptors in the testes, the researchers said.
Read more here. (Live Science)
