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Does Caffeine Affect Your Fertility?

You wake up, groggy, to the smell of freshly brewed coffee. It takes a couple of cups to get you out the door in the morning. When the food coma hits after lunch, it takes a diet cola (or two!) to get you over the hump. This could describe many of us—but what if you’re trying to get pregnant? Does all the caffeine that gets you through the day hurt your chances of conceiving?

If you drink enough of it, the answer is yes, according to Ronald Gray, PhD, a professor in population and family planning at Johns Hopkins Bloomberg School of Public Health. A few years ago, Dr. Gray researched the question of caffeine and fertility. “What we found is that women who consume high amounts of caffeine daily take longer, on average, to get pregnant than women with low or no consumption,” he said. “They had nearly three times the risk of not being able to conceive after one year of trying.”

How Much Is Too Much?

What exactly constitutes a “high amount?” In Dr. Gray’s study, anything over 300 milligrams per day, which is the equivalent to about two 8-ounce cups of drip-brewed coffee, four 8-ounce cups of tea (hot or iced), nine caffeinated sodas, or 15 ounces of dark chocolate.

Other studies from research groups at Yale University School of Medicine and the National Institute of Environmental Health Sciences have confirmed that consuming over 300 milligrams of caffeine per day reduces fertility, but a study from Alicante University in Spain found effects only at levels of 500 milligrams per day or more. The bottom line is that for your best chance of conceiving quickly, it’s best to reduce or eliminate caffeine consumption. Remember to count all of your caffeine sources when figuring out how much you need to cut back.

Cutting Back on Caffeine

How can you cut back without too much pain? We asked some women who were able to successfully limit caffeine to share their tricks:

“I was a serious caffeine drinker,” says Amy Story of Westford, Massachusetts. “I made a deal with myself. I’d nurse one diet cola all day long by pouring some into a tiny cup. After I drank the tiny bit of cola, I’d have to drink three times that amount of water. Then I gave myself permission to have another tiny cup of cola.”

“I switched over to decaf iced tea, slowly decreasing the number of glasses of the real stuff each day,” said Sally Haskell of Brentwood, Tennessee. “It was hard at first. I had to be careful to go slowly over many days, otherwise I’d pay for it with a whopping headache.”

Mary North of Ann Arbor, Michigan, recalls: “For me the ritual of making coffee in the morning and the smell and taste of that first sip are as important as the caffeine effect. I switched to decaf French roast and did not feel deprived.” Decaffeinated coffee and other beverages are not caffeine-free, but only contain about one-tenth the amount of caffeine.

How to Cope Without the Coke

Some other tips from the trenches of life with reduced caffeine:

  • Eat a protein-rich breakfast in the morning to maintain energy throughout the day.
  • Buy cans of carbonated, flavored water. Whenever the urge to have a soda hits, pop open a can of carbonated water. At least you get to hear that “pop” sound and have the fizzy mouth feel!
  • Although chocolate has caffeine, it is much less than what’s in coffee, so try drinking a hot chocolate instead of a coffee-based drink.
  • Put more milk in your coffee so that the same amount of coffee stretches out to two cups. (Plus you get the added calcium from the milk!)
  • Because caffeine stays in your body for several hours, drinking caffeine in the afternoon or evening can disturb your sleep, leaving you wanting even more caffeine the next morning. Break the cycle by eliminating late-day caffeine first.
  • Go slow—reducing caffeine intake too quickly can cause withdrawal symptoms like headache, nervousness, restlessness, and fatigue.
  • Don’t beat yourself up. Stress caused by unreachable goals or overly tight restrictions may be just as harmful to your well-being as a cup of coffee!

It may help to keep the goal in mind—a healthy pregnancy and a healthy baby. Cutting back in the preconception period will help you when you do become pregnant, because the US Food and Drug Administration recommends an even lower intake (no more than 150 milligrams per day) during pregnancy. That’s about one cup of coffee!

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