A systematic review (SR) was carried out whose main objective was to identify the prevalence of eating disorders during pregnancy. A systematic review of Cohort Studies was carried out, fulfilling the criteria of the review protocol Preferred Reporting Items for Systematic reviews and Meta-Analyzes (PRISMA). In the searches, the electronic databases were used, applying the inclusion criteria, Web of Science, Scopus and MEDLINE. We identified 72 articles that met the inclusion criteria. After a series of screenings, which are described below, 9 studies were included in the SR. Once the articles were analyzed, it is observed, as a result of them, that there is a higher prevalence of pregnant women who present eating disorders. This may be due to the greater accessibility to assisted reproduction techniques currently available, where women with previous disorders have access to these techniques. No studies have been found that properly guide health professionals in the prevention, early detection and treatment of eating disorders in pregnancy and puerperium.