Pregnancy and Prenatal Vitamins – 5 Reasons Why Doctors Prescribe it to Expecting Mother It is recommended that a balanced diet and supplements be used in combination to maintain a healthy pregnancy. Prenatal tablets contain Folic Acid, Iron and Calcium, Vitamin D, Vitamin B12, Vitamin B6, and Vitamin E that are prescribed by doctors during pregnancy. https://www.vingle.net/posts/5535003