Pregnancy in women with type 1 diabetes mellitus is associated with an increased risk of congenital malformations, perinatal mortality, obstetric complications, and neonatal morbidity. These adverse outcomes are at least partly related to periconceptional care, especially the level of glycemic control. Adequate preconceptional care reduces the frequency of congenital malformations and improves pregnancy outcomes. Motivating diabetic women to plan their pregnancies, optimize glycemic control and, start folic acid supplementation before conception is thus an established goal. The goal of the St. Vincent Declaration, established almost 15 years ago, was to improve the pregnancy outcomes of diabetic women to the level of those in the nondiabetic population within 5 years. With the above-mentioned strategy, it is hoped that this goal can be achieved.