This article discusses the effects of caffeine and green tea consumption during pregnancy. It recommends limiting green tea intake due to compounds that can interfere with folate absorption and affect fetal development. Moderate caffeine consumption from coffee and tea of up to 3 cups of coffee or 6 cups of tea per day is considered safe, but higher intake over 600mg per day can reduce birth weight. Drinking 8 or more cups of coffee daily increases risk of miscarriage or stillbirth.