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Can carbs impact fertility? What to Eat this Holiday Season for Fertility Wellness

Can carbs impact fertility? What to Eat this Holiday Season for Fertility Wellness

Jackie Vinyard, M.S. Health Sciences | October 25, 2019 | Fertility Awareness

 My eyes scan the table and narrow in on the pecan pie, the chocolate truffles, and mugs full of hot chocolate with whipped cream. But I find the carrots and celery and load them onto my plate with a heaping spoonful of hummus and walk away feeling fully happy and satisfied. Ha ha ha. Yeah right! Ok, maybe I put carrots and celery on my plate, but I also carefully put the spoonful of hummus on the plate so as not to touch my cheesy bread rolls and pecan pie. I may even go back for seconds. Later, however, I will be full of food-regret and wish I had only had the carrots, celery, and hummus.  I’m supposed to eat like a rabbit for optimal health, right?

With Halloween candy lying around and even more holidays coming up, what do the experts say about how and what to eat for a healthy body and fertility wellness? In other words, if you are wondering how much pie our bodies can really handle and how much those bread rolls really impact weight and health, read on to learn what the research shows.


It Comes Down to Moderation & Balance

We humans like to simplify things as much as possible. We like to say things like “fat is bad” and “carbs are bad,” but it's typically not that simple. Sure, sometimes it is. For example, we know smoking is bad (1) and that eating too much sugar is bad (2). But it's not so simple with most things in life. Honestly, with all the research that has come out over the past decades saying this or that, it seems like nothing has really changed. This quote from the New Yorker pretty much sums it up: "What this means for most of us is that common sense should prevail. Eat and exercise in moderation; maintain a diet consisting of balanced amounts of protein, fat, and carbohydrates; make sure you get plenty of fruit and vegetables. And enjoy an occasional slice of chocolate cake" (3).


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While that makes sense, apply  ‘balance and moderation’ to everyday life,  can be confusing: What exactly is balance and moderation? Let’s look at the research, particularly with regards to fertility.


How Carbs Impact Fertility

First of all, not all carbs are bad for your health.  Basically, carbohydrates are sugars that come in two main forms: simple and complex. The difference between a simple and a complex carb is how quickly it is digested and absorbed.  Complex carbs such as those found in whole grain bread and most fruits and vegetables have been found to be healthier than simple carbs (6). It's the simple carbohydrates such as white bread, white rice, and cookies that are causing a problem. When we eat simple carbs, our body breaks them down into sugars. The sugars are absorbed into our blood stream, which causes our pancreas to release insulin. Insulin is a hormone that helps the body use or store glucose for energy (7). 

It may be hard to believe that eating simple carbohydrates can have an impact on your fertility levels but if you eat foods high in simple carbohydrates, your body will need to release a lot of insulin. One of the side effects of high insulin is that it can increase the production of male hormones by the ovaries and therefore increases the hormone levels in the blood (8). This hormonal imbalance may affect the balance that is necessary for reproduction and ovulation and may result in ovulatory infertility (8). 

That said, eating too much meat, such as on a Keto diet, can also be harmful. Replacing animal sources of protein with vegetable sources of protein have been noted to reduce ovulatory infertility (4). In fact, Belgium’s new food pyramid categorizes processed meat with sugar and pizza (5). Getting enough protein is important, so take precautions to add other sources protein-rich food sources if you do decide to reduce your animal protein intake.  Here is a great resource to learn more about what to eat. 


It's reasonable to moderate your meat intake and observe a few meat-free days per week. Although red meat may have nutritional value in the protein and iron content, alternative foods such as fish, poultry, beans, or legumes can provide similar benefits.

-William Kormos, MD


More on Sugar & Fertility 

While cutting out sugar won't help fix physical impediments such as cervical abnormalities or tubal blockages, it can help to minimize ovulatory dysfunction and promote a healthier you, pregnancy, and baby. A landmark study, The Nurses Health Study, which followed more than 18,000 women, looked at diet and lifestyle over 8 years among women hoping to conceive. The study revealed that women who ate a higher proportion of the easily digested carbs (simple or “fast” carbs), such as sugary soda drinks, white bread, and potatoes, increased their chances of developing ovulatory infertility. Specifically, the results showed that women who ate a high-glycemic diet were 92% (yes 92%!) more likely to have ovulatory infertility.

In contrast, the women who ate a higher proportion of the more slowly digested carbs that are richer in fiber had improved fertility. These foods include vegetables, dark breads, brown rice, and beans (9). 


According to the American Heart Association (AHA), the maximum amount of added sugars you should eat in a day are: Men: 150 calories per day (37.5 grams or 9 teaspoons). Women: 100 calories per day (25 grams or 6 teaspoons).


The majority of us exceed 25 grams of added sugar per day (10). One cup of hot chocolate, for example, may contain 25 grams or more of sugar alone. So, can you eat that piece of pie? Occasionally, like once a week, should be fine. Especially, if you are able to stick to the recommended daily amount of added sugar. Watch out for added sugars to foods that you wouldn't suspect having sugar such as breads, sauces, and salad dressings. 


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Also, exercise is as effective as some diabetic medications to help your body use glucose more effectively. So if you decide that Friday is dessert day or you are going to a holiday party, plan on exercising beforehand. Even exercising in the morning will help your body later that evening. If you don’t have time to exercise beforehand, a walk afterwards can help too (11). Exercise!


The short of it is to avoid fad diets, aim to stick to AHA recommended maximum amount of daily sugar, eat a balanced diet including vegetables, healthy grains and  fruits. 

Read more about the fertility diet here.


  1. https://www.reproductivefacts.org/news-and-publications/patient-fact-sheets-and-booklets/documents/fact-sheets-and-info-booklets/smoking-and-infertility/
  2. https://www.health.harvard.edu/heart-health/the-sweet-danger-of-sugar
  3. https://www.newyorker.com/magazine/2017/04/03/is-fat-killing-you-or-is-sugar
  4. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3066040/
  5. http://www.fao.org/nutrition/education/food-dietary-guidelines/regions/countries/belgium/en/
  6. https://www.pcrm.org/good-nutrition/nutrition-information/the-carbohydrate-advantage
  7. https://wa.kaiserpermanente.org/healthAndWellness?item=%2Fcommon%2FhealthAndWellness%2Fconditions%2Fdiabetes%2FfoodProcess.html
  8. Hutchins, J. (2015, November). Your Blood Sugar May Be the Key to Your Hormone Imbalance. Cleveland Clinic.
  9. https://www.health.harvard.edu/diseases-and-conditions/follow-fertility-diet
  10. https://www.accessdata.fda.gov/scripts/InteractiveNutritionFactsLabel/sugars.html
  11. https://www.shape.com/healthy-eating/diet-tips/ask-diet-doctor-how-erase-sugar-binge