Does drinking coffee or tea affect fertility?

“Can I have caffeine before and during my treatment?” is a great question we’ve gotten from our egg freezing and IVF Ovally customers. As is so often the case, the research on this question isn’t as clean and clear-cut as we’d like: It’s hard to separate out variables besides caffeine that can affect fertility outcomes, and many studies rely on retrospective self-reports of consumption, which can be unreliable. However, high-quality studies looking at a relationship between caffeine consumption and the ability to conceive during IVF treatment suggest that 1-2 cups of coffee per day don’t significantly affect the ability to conceive. Surprisingly, however, 1-2 cups of coffee a day (or the equivalent level of caffeine in another drink) have been found to double the risk of miscarriage during pregnancy.

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