According to most health organizations, it is generally safe for pregnant women to consume moderate amounts of caffeine, which includes coffee. However, high caffeine intake during pregnancy has been associated with an increased risk of miscarriage and low birth weight. The American College of Obstetricians and Gynecologists recommends limiting caffeine consumption to less than 200 mg per day, which is about one 12-ounce cup of coffee. It's best to consult with your doctor about appropriate caffeine levels during your pregnancy.