Is the use of combined oral contraceptives in the postpartum period as safe as the use of oral progestins?. Portuguese Journal of Family Medicine and General Practice, [S. l.], v. 25, n. 1, p. 31–6, 2009. DOI: 10.32385/rpmgf.v25i1.10587. Disponível em: https://rpmgf.pt/ojs/index.php/rpmgf/article/view/10587. Acesso em: 17 apr. 2026.