Guttmacher Institute. «Contraceptive Use». Facts in Brief. Guttmacher Institute. Consultado em 10 de maio de 2005. Arquivado do original em 25 de maio de 2005 - see table First-Year Contraceptive Failure Rates
Collaborative Group on Hormonal Factors in Breast Cancer (1996). «Breast cancer and hormonal contraceptives: Collaborative reanalysis of individual data on 53 297 women with breast cancer and 100 239 women without breast cancer from 54 epidemiological studies». The Lancet. 347 (9017): 1713–27. PMID8656904. doi:10.1016/S0140-6736(96)90806-5
Kemmeren JM, Tanis BC, van den Bosch MA, Bollen EL, Helmerhorst FM, van der Graaf Y, Rosendaal FR, Algra A (2002). «Risk of Arterial Thrombosis in Relation to Oral Contraceptives (RATIO) Study: Oral Contraceptives and the Risk of Ischemic Stroke». Stroke. 33 (5): 1202–8. PMID11988591. doi:10.1161/01.STR.0000015345.61324.3F
Baillargeon JP, McClish DK, Essah PA, Nestler JE (2005). «Association between the Current Use of Low-Dose Oral Contraceptives and Cardiovascular Arterial Disease: A Meta-Analysis». Journal of Clinical Endocrinology & Metabolism. 90 (7): 3863–70. PMID15814774. doi:10.1210/jc.2004-1958
Edelman A, Micks E, Gallo MF, Jensen JT, Grimes DA (29 de julho de 2014). «Continuous or extended cycle vs. cyclic use of combined hormonal contraceptives for contraception.». The Cochrane database of systematic reviews. 7: CD004695. PMID25072731. doi:10.1002/14651858.CD004695.pub3
Williams RJ, Johnson AC, Smith JJ, Kanda R; Johnson; Smith; Kanda (2003). «Steroid estrogens profiles along river stretches arising from sewage treatment works discharges». Environ Sci Technol. 37 (9): 1744–50. PMID12775044. doi:10.1021/es0202107 !CS1 manut: Nomes múltiplos: lista de autores (link)
Zeilinger J, Steger-Hartmann T, Maser E, Goller S, Vonk R, Länge R; Steger-Hartmann; Maser; Goller; Vonk; Länge (dezembro de 2009). «Effects of synthetic gestagens on fish reproduction». Environ. Toxicol. Chem. 28 (12): 2663–70. PMID19469587. doi:10.1897/08-485.1 !CS1 manut: Nomes múltiplos: lista de autores (link)
Johnson AC, Williams RJ, Simpson P, Kanda R; Williams; Simpson; Kanda (2007). «What difference might sewage treatment performance make to endocrine disruption in rivers?». Environ Pollut. 147 (1): 194–202. PMID17030080. doi:10.1016/j.envpol.2006.08.032 !CS1 manut: Nomes múltiplos: lista de autores (link)
Johnson AC, Williams RJ; Williams (2004). «A model to estimate influent and effluent concentrations of estradiol, estrone, and ethinylestradiol at sewage treatment works». Environ Sci Technol. 38 (13): 3649–58. PMID15296317. doi:10.1021/es035342u
Serge Herceberg; Paul Preziosi; Pilar Galan. «Iron deficiency in Europe»(PDF). Public Health Nutrition. 4 (2B): 537–545. Consultado em 19 de novembro de 2010. Arquivado do original(PDF) em 26 de julho de 2011
interport.net
users.interport.net
Holck, Susan. «Contraceptive Safety». Special Challenges in Third World Women's Health. 1989 Annual Meeting of the American Public Health Association. Consultado em 7 de outubro de 2006
macalester.edu
Batt, Sharon (primavera de 2005). «Pouring Drugs Down the Drain»(PDF). Herizons. 18 (4): 12–3. Consultado em 10 de novembro de 2014. Arquivado do original(PDF) em 15 de março de 2012
Taylor, Tamara; Keyse, Laura; Bryant, Aimee (2006). Contraception and Sexual Health, 2005/06(PDF). London: Office for National Statistics. ISBN1-85774-638-4. Consultado em 22 de abril de 2007. Arquivado do original(PDF) em 9 de janeiro de 2007 British women aged 16–49: 24% currently use the Pill (17% use Combined pill, 5% use Minipill, 2% don't know type)
Collaborative Group on Hormonal Factors in Breast Cancer (1996). «Breast cancer and hormonal contraceptives: Collaborative reanalysis of individual data on 53 297 women with breast cancer and 100 239 women without breast cancer from 54 epidemiological studies». The Lancet. 347 (9017): 1713–27. PMID8656904. doi:10.1016/S0140-6736(96)90806-5
Kemmeren JM, Tanis BC, van den Bosch MA, Bollen EL, Helmerhorst FM, van der Graaf Y, Rosendaal FR, Algra A (2002). «Risk of Arterial Thrombosis in Relation to Oral Contraceptives (RATIO) Study: Oral Contraceptives and the Risk of Ischemic Stroke». Stroke. 33 (5): 1202–8. PMID11988591. doi:10.1161/01.STR.0000015345.61324.3F
Baillargeon JP, McClish DK, Essah PA, Nestler JE (2005). «Association between the Current Use of Low-Dose Oral Contraceptives and Cardiovascular Arterial Disease: A Meta-Analysis». Journal of Clinical Endocrinology & Metabolism. 90 (7): 3863–70. PMID15814774. doi:10.1210/jc.2004-1958
Edelman A, Micks E, Gallo MF, Jensen JT, Grimes DA (29 de julho de 2014). «Continuous or extended cycle vs. cyclic use of combined hormonal contraceptives for contraception.». The Cochrane database of systematic reviews. 7: CD004695. PMID25072731. doi:10.1002/14651858.CD004695.pub3
Williams RJ, Johnson AC, Smith JJ, Kanda R; Johnson; Smith; Kanda (2003). «Steroid estrogens profiles along river stretches arising from sewage treatment works discharges». Environ Sci Technol. 37 (9): 1744–50. PMID12775044. doi:10.1021/es0202107 !CS1 manut: Nomes múltiplos: lista de autores (link)
Zeilinger J, Steger-Hartmann T, Maser E, Goller S, Vonk R, Länge R; Steger-Hartmann; Maser; Goller; Vonk; Länge (dezembro de 2009). «Effects of synthetic gestagens on fish reproduction». Environ. Toxicol. Chem. 28 (12): 2663–70. PMID19469587. doi:10.1897/08-485.1 !CS1 manut: Nomes múltiplos: lista de autores (link)
Johnson AC, Williams RJ, Simpson P, Kanda R; Williams; Simpson; Kanda (2007). «What difference might sewage treatment performance make to endocrine disruption in rivers?». Environ Pollut. 147 (1): 194–202. PMID17030080. doi:10.1016/j.envpol.2006.08.032 !CS1 manut: Nomes múltiplos: lista de autores (link)
Johnson AC, Williams RJ; Williams (2004). «A model to estimate influent and effluent concentrations of estradiol, estrone, and ethinylestradiol at sewage treatment works». Environ Sci Technol. 38 (13): 3649–58. PMID15296317. doi:10.1021/es035342u
Taylor, Tamara; Keyse, Laura; Bryant, Aimee (2006). Contraception and Sexual Health, 2005/06(PDF). London: Office for National Statistics. ISBN1-85774-638-4. Consultado em 22 de abril de 2007. Arquivado do original(PDF) em 9 de janeiro de 2007 British women aged 16–49: 24% currently use the Pill (17% use Combined pill, 5% use Minipill, 2% don't know type)
Serge Herceberg; Paul Preziosi; Pilar Galan. «Iron deficiency in Europe»(PDF). Public Health Nutrition. 4 (2B): 537–545. Consultado em 19 de novembro de 2010. Arquivado do original(PDF) em 26 de julho de 2011
Guttmacher Institute. «Contraceptive Use». Facts in Brief. Guttmacher Institute. Consultado em 10 de maio de 2005. Arquivado do original em 25 de maio de 2005 - see table First-Year Contraceptive Failure Rates
Batt, Sharon (primavera de 2005). «Pouring Drugs Down the Drain»(PDF). Herizons. 18 (4): 12–3. Consultado em 10 de novembro de 2014. Arquivado do original(PDF) em 15 de março de 2012
webmd.com
«WebMed» (em inglês). What to Do About Missed or Skipped Birth Control Pills - Topic Overview. Consultado em 21 de setembro de 2016