This is your sperm on drugs

Fight disinformation. Get a daily recap of the facts that matter. Sign up for the free Mother Jones newsletter.


There’s been evidence for years that heavy marijuana use damages men’s fertility, and researchers may have finally figured out how. It appears that THC, the active ingredient in marijuana, may have pretty much the same effect on sperm that it has on humans.

Recent Must Reads

12/15 – Michael, Tiger, and Osama

12/14 – Bye-bye bubble wrap

12/13 – Poor prey for people parts

12/12 – Grizzlies headed for grisly end

NEW SCIENTIST reports that when sperm in test tubes were treated with high levels of THC, rather than swimming briskly like gametes with places to go and people to see, they meandered lazily, not getting very far. If they did happen to reach an egg, they seemed unable to bind to it and penetrate. “It really stops them cold,” said one researcher.

ONE MORE QUICK THING:

Or at least we hope. It’s fall fundraising time, and we’re trying to raise $250,000 to help fund Mother Jones’ journalism during a shorter than normal three-week push.

If you’re reading this, a fundraising pitch at the bottom of an article, you must find our team’s reporting valuable and we hope you’ll consider supporting it with a donation of any amount right now if you can.

It’s really that simple. But if you’d like to read a bit more, our membership lead, Brian Hiatt, has a post for you highlighting some of our newsroom's impressive, impactful work of late—including two big investigations in just one day and covering voting rights the way it needs to be done—that we hope you'll agree is worth supporting.

payment methods

ONE MORE QUICK THING:

Or at least we hope. It’s fall fundraising time, and we’re trying to raise $250,000 to help fund Mother Jones’ journalism during a shorter than normal three-week push.

If you’re reading this, a fundraising pitch at the bottom of an article, you must find our team’s reporting valuable and we hope you’ll consider supporting it with a donation of any amount right now if you can.

It’s really that simple. But if you’d like to read a bit more, our membership lead, Brian Hiatt, has a post for you highlighting some of our newsroom's impressive, impactful work of late—including two big investigations in just one day and covering voting rights the way it needs to be done—that we hope you’ll agree is worth supporting.

payment methods

We Recommend

Latest

Sign up for our free newsletter

Subscribe to the Mother Jones Daily to have our top stories delivered directly to your inbox.

Get our award-winning magazine

Save big on a full year of investigations, ideas, and insights.

Subscribe

Support our journalism

Help Mother Jones' reporters dig deep with a tax-deductible donation.

Donate