Prenatal vitamins typically contain more folic acid and iron than do standard adult multivitamins. Here’s why: Folic acid helps prevent neural tube defects. These defects are serious abnormalities of the brain and spinal cord. Iron supports the baby’s growth and development. Iron also helps prevent anemia, a condition in which blood lacks adequate healthy red blood cells. In addition, some research suggests that prenatal vitamins decrease the risk of having a baby who is small for his or her gestational age. GNP’s Prenatal Multivitamin is a multivitamin used to treat or prevent vitamin deficiency due to poor diet, certain illnesses, or other issues during pregnancy. Vitamins are important building blocks of the body and help keep you in good health.