New contraceptive methods. Portuguese Journal of Family Medicine and General Practice, [S. l.], v. 21, n. 5, p. 475–83, 2005. DOI: 10.32385/rpmgf.v21i5.10171. Disponível em: https://rpmgf.pt/ojs/index.php/rpmgf/article/view/10171. Acesso em: 18 apr. 2026.