PreNatal - 60 Tablets Compare to Stuart Prenatal. Features: Compare to Stuart Prenatal. 21st Century's PreNatal contains 800 mcg of Folic Acid (200% daily value) and will provide vitamin and mineral supplementation throughout pregnancy and during the postnatal period for both the lactating and nonlactating mothers. Instructions: Store at room temperature. Keep out of reach of children. Do not use if product appears to be tampered with or seal is broken.