Excess caffeine may lead to low birth weight and miscarriage. Caffeine may affect baby’s growth as it may constrict blood vessels and limit the nutrient supplies to baby. Also, caffeine inhibits iron absorption. The low iron stores at fetal stage causes higher risk of iron deficiency anemia during infant development. Yet, pregnant mothers need not avoid caffeine totally. American Dietetic Association suggests 300mg daily (equals to 3 cups of coffee) as the upper limit of caffeine intake for pregnant women. Other sources of Caffeine include tea, soda, chocolates and energy drink!