Epidemiological factors and prophylaxis of ovarian tumors.
D001741:Black or African American; D003276:Contraceptives, Oral / Q000494:pharmacology; D005260:Female; D006801:Humans; D010051:Ovarian Neoplasms / Q000453:epidemiology* / Q000209:etiology / Q000473:pathology / Q000517:prevention & control / Q000628:therapy; D012306:Risk; D012959:Socioeconomic Factors; D044465:White People
D003276:Contraceptives, Oral