Researchers in the United States have found that exposure to cannabis vapour lowered sperm counts and slowed sperm movement or motility, not only in directly exposed male mice, but also in their sons. The Washington State University (WSU) study which is published in the journal ‘Toxicological Sciences,’ builds on other human and animal studies, showing that cannabis can hinder male reproductive function. According to the study’s corresponding author Kanako Hayashi more research needs to be done, but the study’s generational findings should give cannabis users pause.
“This is a warning flag. You may take cannabis for some kind of momentary stress, but it could affect your offspring,” said Hayashi, who is an associate professor in WSU’s School of Molecular Biosciences. Human sperm counts have declined by as much as 59 per cent in recent decades, according to some estimates. There are likely many reasons for this decline, Hayashi said, but this study adds to the evidence that cannabis use may be detrimental to male reproductive function, reported the ‘Medical Xpress’.