Abstract
This article aimed to analyze published studies on the influence of breastfeeding in reducing the risk of breast cancer. The selected articles were searched in the PubMed, LILACS, Scielo and Google Scholar databases and published between 2002 and 2020. Little has been studied about the relationship between breast cancer and breastfeeding. It is possible that breast sucking, performed by the newborn, promotes hormonal changes that affect the development of this disease. Among the 11 reviewed articles, 10 attested to the role of breastfeeding in reducing the onset of breast cancer, with this reduction being greater the longer the time of breast milk supply. Despite the numerous benefits, breastfeeding rates in Brazil are still insufficient. In view of the positive impact of this practice on reducing the incidence of breast cancer, guidance to pregnant women on the relevance and management of this process is necessary.