Sipping coffee throughout the day during pregnancy can make you feel refreshed and give your systems a jolt but it does a lot of harm to your growing baby inside. Continuous intake of caffeine makes the blood vessels of your body become narrow that restricts the blood flow to the baby. Also certain compounds present in coffee hinder the absorption of iron that is vital for the growth and development of your baby. For the same reason stay away from products that are loaded with caffeine like soft drinks iced tea diet colas energy drinks and also your regular tea.