Coffee drinkers risk miscarriage

Pregnant women who drink more than one cup of coffee a day are putting their babies at risk, new research suggests. Previous studies have produced mixed results on the question of whether small amounts of caffeine could complicate pregnancy. But a new study by health-care firm Kaiser Permanente concluded that even small amounts can be dangerous. The study found that 200 milligrams of caffeine—the equivalent of two cups of regular coffee—can double the risk of miscarriage, especially during the first trimester. When a mother-to-be consumes caffeine in the form of coffee, tea, soda, or even chocolate, she is decreasing blood flow to the placenta and stressing the metabolism of the fetus. “There has been a lot of uncertainty about this,” study leader De-Kun Li tells New Scientist. “To me, the safe dose is zero.”