Men who have smoked weed have higher sperm concentrations

It could be that a little bit of pot boosts sperm production a relation that reverses at higher

A United States study of men seeking fertility treatment found that those who had smoked marijuana had a higher sperm concentration than those who never used the drug. Sperm motility decreased, acrosome reactions failed to occur and worst of all, sperm counts dropped" and the function of the Sertoli or "support' cells that create key proteins to sperm production declinees, she explained.

The researchers also noted that their study was conducted among men who visited a fertility clinic, and so the results may not necessarily apply to the general population.

But the experts said smoking marijuana does not help increase fertility in men, and that there was still more to learn about the cause-effect relationship of the drug.

The study by Harvard T.H. Chan School of Public Health in Boston, USA, involved measuring the sperm count of more than 600 men from couples attending a fertility clinic.

As reported by the Bloomberg, the investigators collected over 1,143 semen samples from 662 men who had sought for contraception help at the health facility between 2000 and 2017.

The participants in the new study self-reported their marijuana use, so the details they gave may not have been accurate. The researchers also studied blood samples provided by 317 men, in order to quantify the levels of reproductive hormones.

Fifty-five percent of the men said they had smoked marijuana at some point, with 44 percent doing so in the past and 11 percent being current users.

The results showed that those who smoked marijuana had an average sperm concentration of 62.7 million sperm per millilitre (million/mL).

The findings, published in the journal Human Reproduction, also showed that only 5% of marijuana smokers had sperm concentrations below 15 million/mL, which is the World Health Organization's threshold for "normal" levels, compared with 12% of the non-smokers.

Researchers have investigated whether using cannabis affects a man's fertility.

"These unexpected findings highlight how little we know about the reproductive health effects of marijuana, and in fact of the health effects of marijuana in general".

However, Chavarro noted that some of those past studies surveyed men who use multiple drugs at once, making it hard to pinpoint the effects of marijuana alone.

There's definitely a few caveats to take into account here.

"An equally plausible interpretation is that our findings could reflect the fact that men with higher testosterone levels are more likely to engage in risk-seeking behaviours, including smoking marijuana", says Feiby Nassan, a researcher in environmental health and nutrition at Harvard. One 2014 study surveyed almost 2,000 British men and found that men under 30 with less than four per cent normal sperm were twice as likely to have used marijuana in the past three months.

Lastly, there's also the reality that many men in this study might have been reluctant to admit they've smoked pot.

Although researchers found a potential link between marijuana use and sperm counts, they warned that the findings are not definitive and do "not mean using marijuana is going to increase your sperm count", Chavarro told Time.

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