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Sperm - Marijuana damages sperm of young men
Ralph Teller

Marijuana Use may Damage the size, shape and motility of Men's Sperm

Ralph Teller

Cannabis use might damage sperm DNA

According to researchers from the University of Sheffield, marijuana use damages sperm morphology by decreasing sperm size and motility, and damaging sperm shape and quality.

The study, published in the medical journal Human Reproduction by Dr. Alan Pacey, was the largest of its kind. According to their findings, marijuana use was the only habit that was studied that caused damage to sperm.

It is believed that cannabis causes damage to sperm DNA by interferring with the sperm DNA process.

Pot use may cause infertility

Damaged sperm are thought to swim less well than normal sperm, making it harder to reach a woman’s egg to fertilize it. The damage to sperm quality may effect enough sperm amount to increase the chances of male infertility.

As it usually takes 3 months to make sperm, the researchers recommend that men considering children not use cannabis within at least 3 months of ejaculation.

"Our data suggests that cannabis users might be advised to stop using the drug if they are planning to try and start a family," says study author Dr. Allan Pacey

Other studies have suggested that marijuana could alter the sperm production process.

Still other studies have found marijuana use shrinks male testicles, where sperm is produced. The primary determinator of male fertility is testicle size. The larger the testicles, the more sperm is produced and the greater is the man's fertility. The damage caused by marijuana use lower sperm production quantity directly impacts male fertility.

Studies have also found Pot use lowers testosterone levels in men. Marijuana use is also thought to cause the phenomenum amongst male marijuana users to develop "man boobs" caused by a lowering of testosterone levels and raising of estrogen levels in men.

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