Regular weed smoking can cut sperm counts by as much as a third, according to previous research, reports Scott Campbell at the Daily Mail. But “The weight of the evidence is that marijuana probably has a negative impact not only for sperm counts but sperm function,” said Dr Victor Chow of the University of British Columbia.
Cannabis can also reportedly decrease fertility in women by suppressing ovulation, according to some studies. But I wouldn’t count on that as a reliable method of birth control, stoner.
2014 Study Shows ‘Poor Sperm’
A 2014 study suggested that being a stoner doubled the risk of men under 30 having ‘poor sperm.’
“Statistically it jumped out of the analysis,” Dr. Allan Pacey claimed to The Independent.
“I think it’s a real effect, and it’s not been show before in such a robust way.” ~ Dr. Allan Pacey
According to that study, semen production cycles normalize after 90 days. “You’ve got to stop in June to see an improvement tin August,” Dr. Pacey said.
But A 2003 Study Says Weed Makes Sperm Hyperactive
A 2003 study, on the other hand, found that stoned semen are hyperactive, and move too fast, instead of being lazy. Make up your minds, scientists!
Researchers from the University of Buffalo School of Medicine and Biomedical Sciences, led by Dr. Lani Burkman, conducted what they called the first study to examine the effect of marijuana smoking on the specific swimming behavior of sperm.
The scientists compared samples of semen from 22 men who were heavy pot smokers with that of 59 fertile men who had impregnated women.
“The bottom line is, the active ingredients in marijuana are doing something to sperm, and the numbers are in the direction towards infertility,” said Dr. Burkman in 2003 (she died in 2016).
“The sperm from marijuana smokers were moving too fast too early. The timing was all wrong. These sperm will experience burnout before they reach the egg and would not be capable of fertilisation.” ~ Dr. Lani Burkman
2002 Study Says Cannabis Doesn’t Cause Infertility
A study of semen from five heavy cannabis smokers was performed by Dr. Anne Jequier, president of the Fertility Society of Australia. It found that cannabis doesn’t cause infertility.
“[W]e took five heavily addicted marijuana smokers and we looked at their semen. We could find nothing wrong with the routine semen analysis.” ~ Dr. Anne Jequier