As you learn when you mention to the gynecologist that you are planning to have children, the need for minerals and vitamins increases during pregnancy and breastfeeding. Iron, folic acid and vitamin B12, among others, are needed to ensure the healthy development of the fetus or infant. Learn here why a deficiency should be prevented when you are already planning to have children and how high the need for these biofactors is during pregnancy and breastfeeding.