From International Business Times:
Professor in psychiatry and behavioral sciences at Duke and senior author of the study Scott Kollins, Ph.D., told Science Daily that cannabis has proven to have an effect on males and their reproductive health, specifically that it alters the genetic profile in their sperm.
“We don’t yet know what that means, but the fact that more and more young males of child-bearing age have legal access to cannabis is something we should be thinking about,” he added.