Is caffeine harmful to a pregnancy? How much can you safely have?

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British Medical Journal published a study of 2,635 low-risk pregnant patients, their caffeine consumption amounts, and pregnancy outcomes.  The results were pretty
interesting.   The study was performed because past studies had shown that caffeine use of more than 300 mg a day seemed to be associated with fetal growth restriction (lower weight infants) and miscarriage.  But, researchers were
unsure if past studies were done taking into account all the important
factors.

The results of the BMJ study showed that with increasing caffeine consumption, babies at birth weighed less.  For example, when compared to women who drank on average 50 mg caffeine per day those who drank 200 mg caffeine a day had babies weighing 2.5 ounces less at birth and those who drank 300 mg caffeine a
day had babies weighing 5.75 ounces less at birth.

One take-away point is that there is a small, but notable,
decrease in infant birth weight dependent on amount of maternal caffeine intake.  Researchers state that although a safe threshold cannot be determined, maternal caffeine intake of less than 100 mg per day minimizes the risk of fetal growth restriction.

http://www.bmj.com/content/337/bmj.a2332.full

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About drlesliegreenberg

I have been practicing as a family physician for over 20 years--as both an educator of physicians and clinician. From infancy to the elderly, I perform obstetrics and general medicine. I love my career and am passionate about my field of knowledge and my patients. Follow me on Facebook at Leslie Md Greenberg Medical Disclaimer The content of this website is provided for general informational purposes only and is not intended as, nor should it be considered a substitute for, professional medical advice. Do not use the information on this website for diagnosing or treating any medical or health condition. If you have or suspect you have a medical problem, promptly contact your professional healthcare provider.
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