A recent study in Denmark revealed that smoking marijuana may cause several side effects on men sexually.
This after researchers subjected about 2,000 men into a survey about their lifestyle, specifically related to their alcohol and tobacco use and other vices.
After the survey, the participants' semen samples were collected to determine sperm counts and concentration.
According to Livescience, researchers found out that men who smoked marijuana for more than once a week showed signs of reduced sperm production by 29 percent than those who use marijuana less frequently or not at all.
"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.
Researchers believe that the presence of marijuana's psychoactive agent THC and its interaction with the testes may have caused marijuana's sexually harmful side effects.
Aside from that, smoking marijuana could affect the quality of sperm a man can produce.
There had been significant deterioration in the sperm morphology or the size and the shape of the sperm for men around 30 years old and younger who used marijuana at least once in the past three months.
However, experts admitted that they still speculate the exact relationship of the side effects of marijuana, sexually, since there are other lifestyle factors that should be considered.
"These lifestyle factors also could have affected the men's sperm levels, so the researchers took them into account, and the link between marijuana and lower sperm levels held," Jensen told Livescience. "However, the study still does not prove that the drug caused the lower sperm counts."
Sharing the same sentiment, Dr. Alan Pacey, a senior lecturer in Andrology at the University of Sheffield in England told Fox News that there is a possibility that other lifestyle habit may have caused infertility among respondents.
"The study has other implications besides the possible link between marijuana and infertility," he said. "The researchers did not find any associations between other common lifestyle factors, such as cigarette smoking and alcohol consumption - two habits that have long been associated with male infertility."
