Whether those changes can be passed on to a child remains unknown, but for now, some researchers are warning that men in their childbearing years should consider how weed might impact their fertility and possibly their offspring.
Nevertheless, because much of this research is based on animal models and those with histories of drug abuse, the average pot smoker still can't be sure there's anything sinister to worry about.
However, it's unclear whether using cannabis helps or hinders a man's chances of conceiving.
The results were surprising - and show how much more there is to learn about the link between marijuana use and fertility, the scientists said.
The researchers have cautioned that there are limitations to the findings, as some of the participants may have under-reported their cannabis use.
The researchers also took blood samples from 317 of the men to assess their hormone levels and found that marijuana smokers had higher levels of testosterone.
Just over 50 per cent of the men reported using cannabis; half of these men reported using it in the past, while 11 per cent said they were current users.
As the researchers hypothesized that marijuana smoking would be associated with poorer semen quality, they were surprised to find that men who had smoked marijuana at some point in their lives actually had a higher average sperm concentration - 62.7 million sperm per ml of ejaculate - than men who had never smoked, who had an average concentration of 45.4 million sperm per ml of ejaculate.
Researchers have investigated whether using cannabis affects a man's fertility.
Jorge Chavarro, study author and associate professor of nutrition and epidemiology at Harvard Chan School, commented: "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".
He said: "These unexpected findings from our study highlight that we know too little about the reproductive health effects of cannabis".
There's definitely a few caveats to take into account here. Or maybe the relationship between the two is more complicated than it looks on the surface.
"The relations we see between cannabis smoking, sperm counts and testosterone levels are because men with higher testosterone, within normal levels, have higher sperm counts and are more likely to smoke cannabis", she said.
What's more, those who had never smoked pot were more likely to fall into the extremes. So the comparison in sperm counts between reported users and non-users isn't necessarily 100 per cent accurate.
None of these limitations or considerations invalidate study's findings, it's just a sign, as Chavarro said, that we need to study cannabis more (the fact that cannabis is still considered more unsafe than opioids by the USA government remains a roadblock to that research, incidentally).
The trade also ends a failed experiment for the Bulls after Parker signed a $40 million, two-year contract with his hometown team. Porter had averaged 12.6 points, 5.6 rebounds and 1.6 steals per game in 41 appearances and 28 starts this season.
His speech will apparently call for unity across party lines and focus on border security and immigration, among other issues. But whether his message of unity resonates with the public remains to be seen, said Panagopoulos and Vicino.
Même son de cloche dans l'entourage du joueur concernant un pré-accord pour un contrat de cinq ans en Lombardie. Un secteur de jeu que les nouveaux propriétaires niçois devront donc renouveler pour la saison prochaine.
Nul doute qu’elle offrira à Mika la meilleure option pour poursuivre sa carrière dans le sport automobile. Et il n'est pas Andrei Arshavin, pour répondre à la question sur les attentes facilement et naturellement.
La part du réseau Leroy Merlin sur le marché russe de "l'équipement ménager" approche les 20%. Beaucoup d'entre eux se plaignent des manifestations de corruption et des violations de l'éthique des affaires.
After losing to Iowa by 15 on the road Friday, their first loss in two weeks, the Wolverines dropped from No. 5 to No. 7. Including No. 2 Duke and No. 3 Virginia , there are six ACC teams in the Top-25 and one team that received votes.
Je lui parle, et il sait que, lorsque le club aura une nouvelle capacité économique, nous nous réunirons et nous discuterons. Neymar est un joueur exceptionnel, il est très talentueux et il a remporté des titres en France.
If anyone suspects that they or their child has symptoms of measles , they are urged to call their GP first before visiting. Paul Harris, R-Vancouver, has introduced a measure that would remove personal-belief exemptions for the MMR vaccine.
DA Quinn to Request Full Prison Term for Michelle Carter
She has remained free while she pursues the appeals. "Her conduct was wanton and reckless, and caused the death of Conrad Roy". The judge said Carter had a duty to call the police or Roy's family when she knew he was killing himself.
Suns Agree to Deal with Heat for Guard Tyler Johnson
Ellington is in his 10th National Basketball Association season and has averaged 8.4 points in 25 games with the Heat this season. He holds career averages of 8.0 points, 2.2 rebounds and 1.1 assists with 885 career three-point makes on 38.0 percent shooting.
Les NTIC : avantages et inconvénients
En effet, avoir mille et une tâches à accomplir à la fois, ça peut avoir des effets négatifs. En effet, les travailleurs effectuent les tâches beaucoup plus rapidement tout en conservant leur qualité de vie.