Dark chocolate is generally considered safe for pregnant women. The flavonoids in it help in improved blood pressure and blood flow. However, consuming it excessively can pose risks due to caffeine. The American College of Obstetricians and Gynecologists recommends limiting caffeine to 200 milligrams per day during pregnancy (that’s about two (2) 6 oz. cups of coffee). . Dark chocolate has about 12 mg of caffeine in a 30g serving, so it’s possible to healthfully enjoy dark chocolate during pregnancy.