Recent studies have debated whether drinking coffee increases the risk of pregnancy loss.
Although research at Kaiser Permanente found that consuming 200mg or more of caffeine daily may double a woman's risk of miscarriage, another study from the Mount Sinai School of Medicine, in New York City, and other institutions concluded that up to 350mg of caffeine doesn't make a difference. So which is right? A problem with both reports is that they rely on women's faulty memory of their eating and drinking habits over several months, explains Dr. Hartmann, a coauthor of the second study. The American College of Obstetricians and Gynecologists (ACOG) recently released new guidelines saying that there's no association between moderate intake of caffeine and miscarriage or preterm birth. According to ACOG, it's perfectly safe for pregnant women to have 200mg of caffeine per day -- equal to about one 12-ounce cup of coffee or about five cans of a soft drink that contains caffeine.