Photo: Jacques Nadeau Archives The Duty
The analysis of the samples was rather measured an average concentration of 62.7 million sperm per milliliter of éjaculât among the consumers of marijuana, compared with 45.4 million for the other.
Men who have smoked marijuana have a sperm of better quality than those who have never smoked, according to a new study from Harvard University, but an independent expert warns that it should probably take these findings with a grain of salt.
The researchers of the School of public health, T. H. Chan, Harvard, collected 1143 semen samples from 662 men between 2000 and 2017. More than half of them have admitted to having smoked marijuana, and 11 % were found to be smokers common.
The scientists were expecting to find that marijuana use had a negative impact on the reproductive health of men. The analysis of the samples was rather measured an average concentration of 62.7 million sperm per milliliter of éjaculât among the consumers of marijuana, compared with 45.4 million for the other.
But let’s wait a bit before lighting a joint to help to found a family.
“If you want my opinion, for this type of study, I will tell you that, in my opinion, this is a study sensationalistic, it is pure and simple, lance R.-Marc Pelletier, who is an associate professor in the department of pathology and cell biology from the University of Montreal. This is not science. “
He recalls that the participants in this study were of men sub-fertile who went for fertility treatments. “This is not a normal population based,” he says.
Mr. Pelletier also points out that each subject was provided about the two semen samples between 2000 and 2017.
“I don’t want you to trouble, but it’s starting to be a little wide, warns the expert. Someone who has a […] fever, large enough, already the spermatogenesis will be affected. Is there serious in there, I don’t know. “
We do not know anything of the concentration of the marijuana smoke or the frequency of consumption, says Mr. Pelletier. Even if the subject had smoked a joint the morning of collection, it would not be possible to establish a link of cause and direct effect with the quality of his sperm.
The authors of the study recognise that their work is not perfect : some men may have hesitated to prove to be a consumer of marijuana since it is a drug that is illegal in the United States, and there are few similar studies with which to compare these results.
The findings of the study are published by the medical journal Human Reproduction.