A prenatal / postpartum multivitamin is specially designed to help support the increased nutrition needs of pregnancy and the postpartum period for most healthy women. Prenatal / postpartum multivitamins, like Materna, contain at least 0.4 mg of folic acid to help prevent neural tube defects.* Health Canada recommends that a multivitamin also contains 16 - 20 mg of iron, to help reduce tiredness and fatigue, as well as 2. 6 mcg of vitamin B12.1 Some prenatal / postpartum multivitamins also contain DHA, an omega-3 fatty acid, to help support cognitive health and brain function.