LAUSR

OBJECTIVE To describe a breastfeeding theory based on King's Conceptual System. METHOD Theoretical study that used analysis of concept, assertion synthesis, and derivation of theory for the creation of a new theory. RESULTS King's system components were associated with elements of the breastfeeding process and a middle-range theory was created, which describes, explains, predicts, and prescribes breastfeeding by analyzing factors that precede and affect it, as well as their consequences on the breastfeeding process. CONCLUSION The Breastfeeding Interactive Model is abstract enough to be applied in different social, cultural, political, and economic contexts, because it conceptualizes breastfeeding in systemic, dynamic, and procedural aspects. Based on a conceptual model of nursing, it contributes to the scientific construction of the subject; however it can also potentially be applied by other professionals involved in breastfeeding assistance.