Coffee Can Double Risk of Miscarriage

Pregnant coffee-drinkers are being urged to reduce or even avoid the beverage altogether, after new research offers what the Ottawa Citizen called “the clearest and strongest evidence yet” that too much caffeine can dramatically boost the chances of a miscarriage.

The study by Kaiser Permanente, a private health-care provider in Oakland, California, concluded that pregnant women who ingest 200 milligrams or more of caffeine daily face double the risk of a miscarriage compared to women who avoided caffeine. That translates into two cups of regular coffee or five cans of caffeinated soda pop per day.

Interviews conducted with 1,063 California women revealed that 25.5 per cent of those who said they drank more than 200 milligrams of caffeine a day suffered miscarriages. By contrast, 12.5 per cent of those who reported no caffeine intake suffered miscarriages.

The study also found that women who consumed less than 200 milligrams of caffeine a day still had a 42 per cent greater likelihood of losing their baby.

Given these findings, the study concluded that “it may be prudent to stop or reduce caffeine intake during pregnancy.”

Dr. Tracy Flanagan, Kaiser Permanente’s director of women’s health, suggests that pregnant women should consider “switching to decaffeinated coffee and other decaffeinated beverages during your pregnancy.” Tea and hot chocolate also contain caffeine.

“Learn to perk up instead with natural energy boosts like a brisk walk, yoga stretches, snacking on dried fruits and nuts,” Flanagan told CTV.

While not dismissing the need for pregnant women to at least cut back on how much caffeine they consume, Dr. Gideon Koren, director of the Motherisk Program at Toronto’s Hospital for Sick Children, told the Globe and Mail he believes “there’s a difference between caution and hysteria.”

Koren said he counsels expectant mothers to limit their caffeine consumption to 150 milligrams a day. But he also tells them that if they go above that amount, they should not automatically assume they have put their babies at serious risk.

The study is published in the American Journal of Obstetrics and Gynecology.


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