title: Age at first coitus and choice of contraceptive method: preliminary report on a study of factors related to cervical neoplasia.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D003075:Coitus; D003268:Contraception Behavior; D005006:Ethnicity; D005260:Female; D006801:Humans; D010298:Parity; D014481:United States; D002583:Uterine Cervical Neoplasms / Q000209:etiology*