title: OCs protect against ovarian cancer: effect may last as long as 15 years.
mesh_terms: D000569:Americas; D001695:Biology; D003267:Contraception; D003276:Contraceptives, Oral; D003710:Demography; D019049:Developed Countries; D004194:Disease; D005193:Family Planning Services; D009369:Neoplasms; D009656:North America; D010051:Ovarian Neoplasms; D011153:Population; D011157:Population Dynamics; D012106:Research; D012307:Risk Factors; D013223:Statistics as Topic; D013997:Time Factors; D014481:United States
chemical_list: D003276:Contraceptives, Oral
keywords: Americas; Biology; Cancer; Comparative Studies; Contraception; Contraceptive Methods--beneficial effects; Demographic Factors; Developed Countries; Diseases; Family Planning; Neoplasms; North America; Northern America; Oral Contraceptives--beneficial effects; Ovarian Cancer; Population; Population Dynamics; Research Methodology; Risk Factors; Statistical Studies; Studies; Time Factors; United States