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Research Indicates That GMO Could Be a Cause of Infertility

Research Indicates That GMO Could Be a Cause of Infertility

Is it possible that the foods you eat are actually affecting your fertility and inhibiting your chances of getting pregnant? The answer is a resounding, “Yes,” according to dozens of research groups worldwide who have been studying the effects of Genetically Modified Organisms found in many of today’s most common foods.

Genetically Modified foods, according to researchers, are becoming a real problem when it comes to fertility, causing an influx in worldwide infertility rates. Since the 1970s alone, sperm counts among the world’s male population have declined as much as 40-50%, according to some studies. GMO foods may be just one of the reasons, warn those studying the phenomenon.

Despite alerts being published by the world’s most renowned scientists, manufacturers continue to use GM foods in their products to feed to both livestock and humans.

The problem has become so great that the EU has actually banned the use of GMO products throughout Europe, while the United States continues to allow them throughout our nation. While some of the top food manufacturers like Kellogg®, Heinz®, Pepsi®, Coke® and Kraft®, have changed their recipes in Europe, no longer using GMO ingredients in their products, those same products sold in the States continue to use these dangerous ingredients, thanks to the lack of action being taken by the FDA.

So, why do genetically modified foods present such a danger for animal and human fertility? According to a report published last spring by the American Academy of Environmental Medicine (AAEM), “There is more than a casual association between GM foods and adverse health effects.” These findings have caused the AAEM to encourage all physicians to “…educate their patients, the medical community and the public to avoid all genetically modified foods.”

Risks Most Associated with GMO Foods

The Austrian Health Ministers reported in 2008, that their own research indicated that fertility rates have suffered dramatically due to GMO exposure, as has the health of the human immune system. Those who regularly ingest GMO foods are more likely to be sick, age faster and have a harder time getting (and staying) pregnant.

In study after study, the effects on fertility were alarming, claim researchers. In one report, the testicles of some animals actually changed colors from a normal pink to an alarming blue after being fed GMO-produced feed. In addition, sperm was shown to be altered, resulting in fewer pregnancies overall. DNA too has shown alterations after ingesting even the smallest amount of GMO foods.

But, males are not the only ones being affected by GMOs. Female fertility too is under attack. Female animals being studied showed an alarming increase in an inability to get pregnant as well as a spike in premature births, low birth weight babies, and infant mortality after being fed a regular diet of GMO. Rats given GMO feed in Europe were shown to give birth to babies that regularly died within weeks of their birth (sometimes as many as 99%), compared to only a 10% mortality rate for those fed regular feed.

One of the few long-terms studies (there are not many long-term studies done on GMO foods) showed that mice fed GMO corn over a period of 20 weeks had greatly impaired fertility compared to the mice fed non-GMO corn. In addition, the offspring of the GMO mice also suffered from lower fertility rates.

In a summary of the 65 Health Risks of GM Foods presented in his book Genetic Roulette, Jeffrey Smith shares of 20+ North American farmers who reported that their pigs, fed GM corn, “had low conception rates, false pregnancies or gave birth to bags of water. Both male and female pigs became sterile.”

Considering the dire consequences of using this type of food product, why do manufacturers continue to add it to both livestock feed and human food products? Designed to include a built-in pesticide that kills insects when they eat it, Genetically Manufactured Foods contain Bacillus thuringiensis (Bt) to keep all sorts of insects from killing the crops. This increases profit margins as farmers lose less of their crops. Unfortunately, the same Bt that kills off the insects is believed to be causing widespread health and fertility issues throughout the world, causing many countries to ban its use altogether until it can be proven to be safe for consumption. This has left some food manufacturers scrambling to change their ingredients in Europe, while continuing to use these same dangerous products in U.S. foodstuffs.

To make matters worse, the FDA has yet to require food manufacturers to list the use of GMO foods on their packages, leaving many consumers unaware of what they are really eating. This can make it even harder to make the wisest and healthiest food choices while shopping.

Which Foods are Most Likely GMO?

The highest GMO food grown is soy. In the U.S., approximately 54% of all soybeans cultivated in 2000 were genetically-modified, in 2010 93% of soybeans are genetically modified. This is yet another reason to avoid soy foods.

While soy, corn, and potatoes are the most prevalent GMO foods, there are many others that you should be aware about as well, such as:

  • Salmon
  • Canola oil
  • High fructose corn syrup/corn sugar (one of the reasons there is so much GMO corn being grown. The other reason for so much corn is that it is readily fed to livestock)
  • Dairy (conventional cows are injected with the genetically engineered hormone rBGH/rBST and are frequently fed GMO corn and grains.)
  • Processed foods (many processed foods have been tested and shown to contain some GMO ingredients.)

How To Avoid GMO Foods

In the US there are currently no labeling laws requiring that the inclusion of GMO foods be placed on the label. The best ways to avoid GMO foods are to buy organic and shop at the local farmer’s market.

Buy organic – If it is organic, it is not a GMO food. In the US and Canada manufacturers are not allowed to label something as 100% organic if it has been genetically modified or if it is an animal and has been fed genetically modified feed. So when it comes to eggs, dairy and meats, organic is a must.

Know your numbers – On produce there is a little sticker that has a number on it. This can help you identify if the produce is GMO, organic, or conventional. Keep in mind that food producers are not required to tell us if the produce they are selling is GMO, so buying organic is still the best option. Producers of GM foods can choose to opt out of putting PLU labels on their produce if they feel it will impact the consumers choice to purchase their product. If retailers don’t expect to price a GM item differently than the same conventional item, they can label the GM item with a four-digit PLU and omit the ‘8’ identifying it as a GM product.

  • If it is a 4-digit number, or is a 5-digit code beginning with a ‘0’ the produce is conventionally produced.
  • If it is a 5-digit number beginning with an ‘8’, it is GM. However, do not trust that GE foods will have a PLU identifying it as such, because PLU labeling is optional.
  • If it is a 5-digit number beginning with a ‘9’, it is organic.

Avoid processed foods – Processed foods can contain GMO ingredients and do not have to disclose it on the label. They can also contain other harmful ingredients such as MSG and other chemicals without disclosing them on the label. In addition, processed foods are not healthy and should be avoided anyway.


Dr. Christine Traxler M.D., OB/GYN
Dr. Christine Traxler M.D., OB/GYN

Dr. Traxler is a University-trained obstetrician/gynecologist, working with patients in Minnesota for over 20 years. She is a professional medical writer; having authored multiple books on pregnancy and childbirth; textbooks and coursework for medical students and other healthcare providers; and has written over 1000 articles on medical, health, and wellness topics.  Dr. Traxler attended the University of Minnesota College of Biological Sciences and University of Minnesota Medical School,  earning a degree in biochemistry with summa cum laude honors in 1981,  and receiving her Medical Doctorate degree (MD) in 1986.

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  1. Avatar

    Hi, what studies are you talking about? No studies are linked in this article, I’m looking for peer reviewed studies on the topic of gmo and fertility.

    • Dear Arjan,

      You’re welcome to explore the references for this article at the bottom. Click the +References just above the author bio and the list will appear. While we are working to flesh out this guide with more detail and ensure the information is current, there isn’t a scientific consensus on the GMO safety for humans.

  2. Avatar

    I was wondering when this article was published.

  3. Avatar

    I’m wondering if it is 100% illegal to grow GMO foods in Austria and other parts of Europe and if it is 100% illegal to feed livestock GMO foods.

    • Elizabeth Willett, MA, CH

      Hello Jennifer!

      I can not be certain of this, but GeneWatch UK, a not-for-profit policy research and public interest group, shared that “Some other countries in Europe (Germany, France, Luxembourg, Austria) have Government-sponsored voluntary labelling schemes for non-GM-fed meat, milk and eggs so that consumers can choose to buy non-GM-fed products. Organic standards also require non-GM feed.”

      I hope your continued research provides answers.

  4. Avatar

    How to protect by avoiding these kinds of things, unknown factors affecting human races of future. Nice article.

  5. Update 2014 – We are back! We have been away for a while and we sure have missed all of your wonderful questions and thoughts on our articles. Moving forward, one of our staff herbalists will be here to respond to comments! We look forward to connecting with our readers once again!

  6. I have a bachelor’s and master’s degree in biology, am a research dietitian and have the equivalent of a master’s in chemistry, focus biochemistry. I worked at several Texas medical schools in research. In one project, we were studying DNA looking for cures for arthritis and female problems. We were using a supposedly safe bit of genes from mice and E. coli (common bacteria in all mammals) The genetic material went airborne and made almost all of us in the lab very sick, made some people’s children sick and even made people working in nearby offices sick.. I mean sick for six months or more, even becoming disabled physically.

    In 1971 or 1972 there was a British sci-fi movie that came out called NO BLADE OF GRASS. At UT Austin, the lines of college students to see this movie went around the block. The gist of the movie was that a virus got into the grasses of the world, destroying the food supply and letting livestock die by the millions. The only thing left to eat was potatoes and some vegetables. Within weeks in the movie, civilization was destroyed and few people remained alive and even fewer animals. This was not a grade A movie with big stars, but it was pretty well done. It never went to video or DVD. I think if enough people write asking to be able to see this movie, perhaps we can bring it back. With no grass, that means no bamboo, no rice, no wheat, no barley, no rye, no native grasses, no corn, no food hardly for man, bird or beast.

    I have worked with lab rats. Their little undersides are a pretty pink. The idea that GMO food for a few weeks would turn them dark blue is like reading about a horror movie you would wish would go away.

    As a biologist, as a dietitian and healer, I say shoot off some rockets at the coast for warning, our planet is under attack. The people, the animals, the plants themselves, the earth as we have known it for thousands of years. Or as Forrest Gump would say, Stupid is as stupid does. I guess this about sums it up. Please, people, learn to garden organically. Get yourselves some chickens for your home, some rabbits and some milk goats. Feed them as organically as possible. Learn to be self-sufficient and teach everyone you meet to do the same. Plant fruit and nut trees even if you are renting. Make sure they are heritage varieties that breed true.

    Blessings, people Katy did it Katy Bear

  7. Avatar

    Thank you so much for sharing this. Often when doing a web search for food items I simply type in non GMO, then go from there. However one of my favorite online stores when I narrow my search to that. Well its sad how little is left to pick from. Your graph shows why. Amazing & sad. Where I am homebased for now, I have discovered our Amish neighbors offer a very wide selection of everything organic and most of all, free of GMO. Now that I am even more educated on the “bads” of this, I get to try even harder to improve my family’s overall diet. I may have to grow a bigger garden!!!! LOL!

  8. Avatar

    Great Information, Very Helpful. Thanks

  9. Avatar

    this is very educational. thanks for sharing…