String literature about breastfeeding was linguistically and culturally adapted to Portugal. Methodological development study, undertaken at Escola Superior de Enfermagem do Porto, Portugal, between March and May 2012, during a "sandwich" doctoral program in Porto. The theoretical framework of Psychometrics was used, organized in three hubs. In this research, the first was adopted, the theoretical hub, that is, previously constructed health education technology was adapted and, for this purpose, assessed by three expert judges. As a result of this adaptation, modifications were made and it was perceived that string literature about breastfeeding is an important health promotion strategy and that, in order to use it, the presence of health professionals for any clarifications is fundamental. In addition, knowledge is needed about the reality and profile of the users with a view to avoiding constraints. Therefore, nursing has adopted this kind of strategies and perceived the positive result of this use.