Please look at the time stamp on the story to see when it was last updated. They also hope to test the umbilical cord blood of babies born to fathers with THC-altered sperm to determine what, if any epigenetic changes, carry forward to the child. The research team agonized over that wording, he says. In Human Reproduction , the researchers report that they analyzed men who contributed 1, semen samples and serum samples from couples presenting to the Fertility Center between and The study defined regular users as those who smoked marijuana at least weekly for the previous six months. The survey asked the men about past and present drug use, as well as other lifestyle choices. According to a team at the Harvard T.
Researchers adjusted the findings for factors that could affect the sperm counts, like age, abstinence time, smoking, consumption of coffee, alcohol and cocaine. Subscribe to our Newsletter. Subfertility and infertility almost almost always arise as a consequence of oxidative stress, said Hallak. The team plans to continue its research with larger groups. However, Chavarro noted that some of those past studies surveyed men who use multiple drugs at once, making it difficult to pinpoint the effects of marijuana alone.
The researchers found that men who reported ever having smoked marijuana had an average sperm concentration of 63 million sperm per milliliter of semen, compared with 45 million sperm per milliliter of semen among those who had never used marijuana. These results are consistent with a direct prospermatogenic testicular effect of marijuana smoking and secondary compensation in FSH secretion, the researchers conclude. Vij pointed out that both marijuana users and nonusers in the study had normal sperm counts, on average. But the study can be interpreted in several ways. This story has been shared 32, times.
This is an archived article and the information in the article may be outdated. Thank you for subscribing! Other significant predictors were depression OR 2. Further studies are needed to validate that robust findings in animal models will carry over into human experience. Fifty-five per cent reported having used cannabis at some point in the past, and 11 per cent said they currently used the drug.