Gestational diabetes mellitus is defined as glucose intolerance first detected during pregnancy. Maternal obesity and gestational diabetes mellitus have been associated with more difficulties in the establishment and duration of breastfeeding among mothers with gestational diabetes mellitus who have a body mass index above their healthy, normal weight counterparts; plus the large number of social and economic factors that prevent the establishment of satisfactory breastfeeding, makes it essential to provide systematic support, especially in the first days of life, remembering that breastfeeding in turn reduces the risk of diabetes in women. Mexico is a middle-high income Latin American country; studies conducted in metropolitan areas with larger populations indicate that exclusive breastfeeding is often initiated, but it is difficult to continue it; together with the increase in the prevalence of obesity and diabetes mellitus in the population, it is of great importance to integrate maternal and child nutrition policies focused on the prevention of obesity and chronic diseases, as well as practices that contribute to the promotion and support to mothers to achieve successful breastfeeding, at least during the first 6 months of life.