A new study investigates how marijuana smoking can affect the quality of sperm. Its findings contradict the researchers' initial hypothesis.
If you've been confused by the facts surrounding the impact smoking weed can have on a man's sperm count, you're not alone. Here's what experts are saying.
Cannabis and Male Fertility: A Systematic Review. Research supports a role for cannabis in reducing sperm count and concentration.
Some studies have found that men who smoke marijuana have a higher sperm count. Other research has found they have a lower sperm count.
In subjects, each taking the same moderate dose of marijuana daily over only several weeks, their sperm quality plummeted. Sperm motility.