1. Diabetes Care 2002;25: 1027-1032 2. N Engl J Med 2002;346:20125-2032 3. N Engl J Med 1986;315:405-411 4. Lancet 1996; 347:1713-1727 5. Lancet 2003; 362:185-191 6. Arch Intern Med. 2004; 164:741-747. 7. BMJ 1999; 318:69-70 8. JAMA 2001; 285:2232-2239. 9. Dialogo sui farmaci 2000; 5: 223-226 10.BMJ 2001; 323:131 11.Drug and Therapeutics Bulletin, Ed. Italiana. 2002:57 12.Drug and Therapeutics Bulletin, Ed. Italiana. 2000:75 13.Drug and Therapeutics Bulletin, Ed. Italiana. 2003:89 14.Wooltorton E. CMAJ 2003; 168:455-456 15.Van Vliet HAAM et al. Revisione Cochrane in www.cochrane.org 16.Caimi V e Gazzella F. Contraccezione. In Medicina Generale, Utet 2003, a cura di Caimi V e Tombesi M. 17. Gallo MF et al. Combination estrogen-progestin contraceptives and body weight: systematic review of randomized controlled trials. Obstet Gynecol 2004; 103:359-373. 18. FPIN’s Clinical Inquires. Combined oral Contraceptives for mothers who are breastfeeding. Am Fam Phys 2005 Oct 1: 72: 130319. 19. Kahlenborn C et al. Oral Contraceptive Use as a Risk Factor for Premenopausal Breast Cancer: A Meta-analysis. Mayo Clin Proc. 2006 Oct;81(10):1290-1302.