"A meta-analysis published in the October [2006] issue of Mayo Clinic Proceedings indicts oral contraceptives as putting premenopausal women at significantly increased risk for breast cancer, especially women who use them prior to having a child."<ref>http://www.sciencedaily.com/releases/2006/10/061030143351.htm</ref> The World Health Organization has classified oral contraceptives as a group one carcinogen.<ref>http://www.iarc.fr/ENG/Press_Releases/pr167a.html</ref> | "A meta-analysis published in the October [2006] issue of Mayo Clinic Proceedings indicts oral contraceptives as putting premenopausal women at significantly increased risk for breast cancer, especially women who use them prior to having a child."<ref>http://www.sciencedaily.com/releases/2006/10/061030143351.htm</ref> The World Health Organization has classified oral contraceptives as a group one carcinogen.<ref>http://www.iarc.fr/ENG/Press_Releases/pr167a.html</ref> |