From WebMD.com
A study in January’s online issue of American Journal of Obstetrics and Gynecology* from Kaiser Permanente found a link between high doses of daily caffeine (no matter what the source) and an increased risk of miscarriage.
This was the first study to thoroughly control for morning sickness which, according to the researchers, makes the association they found between caffeine and miscarriage risk even stronger.
How Much is Too Much?
Women who consumed 200 mg or more of caffeine per day (two or more cups of regular coffee or five 12-ounce cans of caffeinated soda) had TWICE the risk of miscarriage as women who consumed absolutely no caffeine. What about the women who consumed less than 200 mg of caffeine daily? Their risk of miscarriage increased by more than 40%.
