BackgroundBreastfeeding is a complex phenomenon involving biological, affective, and socio-cultural aspects. Its definition is built by a diversity of beliefs, attitudes, traditions, and myths. Being aware of the connection between the biological and socio-cultural concepts into the Social Representations of breastfeeding in health sciences, will allow us to have a better comprehension of their attitudes/behavior towards breastfeeding. Therefore, the objective of this study is to describe the Social Representations on breastfeeding among Mexican health sciences students.MethodsThis study was carried out based on the structuralist approach of the Social Representations Theory. Data collection was done with free-listing questionnaires with a “breastfeeding” as inducer word among nutrition, medical, and nursing undergraduate students (n=124). The analyses used were: similitude of words and of the meanings of words, prototypical and categorical analysis.ResultsThe findings suggest that the structure of the social representation is composed of breastfeeding components (baby, mother and milk), affective (attachment, love and link), biological (nutrition, breasts and health), and socio-cultural elements (taboo, responsibility and economic). Within the nucleus, only instrumental elements are found, whereas in the peripheries, biological, affective, and socio-cultural elements are observed.ConclusionsThe structure of the social representations of breastfeeding in Mexican undergraduate students in health sciences focuses on instrumental aspects, leaving the background elements with more scientific meanings typical of their training. These results, replicated in different contexts, will allow the creation of educational strategies adapted to strengthen the breastfeeding training of health students to improve breastfeeding promotion in the society.