K2 pedia

Leading experts in the fields of gynecology, reproductive endocrinology, hematology and epidemiology have affirmed that for most women the low absolute risks of combined oral contraceptives (COCs) are outweighed by the well-established benefits of hormonal contraception...
http://www.k2pedia.com/womens-health/59391-experts-confirm-favorable-benefit-risk-profile-of-combined-oral-contraceptives