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Marijuana Smoking Affects Seminal Fluid, Sperm

Marijuana Smoking Affects Seminal Fluid, Sperm

Monday, March 15th 2010

A new study shows that men who smoke marijuana frequently have significantly less seminal fluid, a lower total sperm count and abnormally behaving sperm.

"The bottom line is, the active ingredients in marijuana are doing something to sperm, and the numbers are in the direction toward infertility," said lead study author Lani Burkman, Ph.D., who is an assistant professor of gynecology & obstetrics at the State University of New York at Buffalo.

Burkman today presented her study here at the annual meeting of the American Society for Reproductive Medicine. She said it is the first study to assess marijuana's effect on specific swimming behavior of sperm from marijuana smokers and to compare the results with sperm from men with confirmed fertility.

While marijuana also contains other cannabinoids, Burkman said it is tetrahydrocannabinol (THC) that appears to be harming male fertility. "THC may be causing improper timing of sperm function by direct stimulation, or it may be bypassing natural inhibition mechanisms. Whatever the cause, the sperm are swimming too fast too early," explained Burkman. She said this aberrant pattern has been connected to infertility in other studies.

In the current study, the researchers received seminal fluid from 22 confirmed marijuana smokers and subjected the samples to a variety of tests. The volunteers reported smoking marijuana approximately 14 times a week for an average of 5.1 years.

The sperm from the pot smokers was compared to sperm obtained from 59 fertile men who had produced a pregnancy. All men abstained from sexual activity for two days before the lab analysis.

The samples from both groups were tested for volume, sperm-count-per-unit of seminal fluid, total sperm count, percent of sperm that was moving, velocity and sperm shape. In addition, sperm were assessed for hyperactivation, a closely regulated and very vigorous type of swimming that is required as the sperm approaches the egg. Burkman and her colleagues evaluated hyperactivation and velocity while the sperm was in seminal fluid and again after washing and incubation, when the dead sperm were eliminated.

The researchers found the volume of seminal fluid and the total number of sperm from marijuana smokers were significantly less than for fertile control men. Significant differences also appeared when hyperactivation and velocity (before and after washing) were assessed.

"The sperm from marijuana smokers were moving too fast too early," said Burkman. "The timing was all wrong. These sperm will experience burnout before they reach the egg and would not be capable of fertilization."

She said while men who smoke pot have fathered children, her study shows that chronic marijuana smoking may leave a male with only borderline fertility potential. Burkman said a man would need to abstain from pot smoking for a period of 4 months or longer, at least theoretically, before their fertility potential could return to normal.

"If you are smoking a lot of marijuana you are messing up a normal system that is operating in your body," said Burkman in an interview with Reuters Health. "We would advise current smokers of marijuana that they need to get off of it for several months. The reason is that THC is stored in their fat and it will take months to come out of their fat."

By John Schieszer

Sourced from Reuters Health  October 15th 2003

Footnote from Ideal Health:

The following supplements are all useful for sperm health:

L-Arginine 500 mg
Beta Sitosterol
Herbal Y Extreme for Men
Men's Multi Plus
Zinc OptiSorb
Prosgenia A + B
Yeast Free Selenium
Self Test Mineral & Toxic Element Test Kit
Vital 4SP

Related health information can be found here:

DIM Plus to assist in cancer prevention
Free radicals and antioxidants
Improve fertility levels and libido with Tribulus
Multivite - why taking a multivitamin and mineral supplement is so essential?
The Prostate Gland

Related articles can be found here:

Health-Giving Broccoli the Best of the Bunch
Lifestyle Changes May Prevent or Reverse Prostate Cancer
Second Prostate Cancer Gene Found

If you need help or advice, you are welcome to email our naturopathic team with your health question.

Disclaimer: The health information presented here has been written for the New Zealand health consumer. It is of a general nature and is only intended to provide a summary of the subjects covered. The information is not intended to be comprehensive or to provide medical advice to you. While all care has been taken to ensure the accuracy of the information, no responsibility or liability is accepted, and no person should act in reliance on any statement contained in the information provided. All health ailments should be treated by a qualified health professional.


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