Changes in sexual behavior and venereal diseases.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001290:Attitude; D003075:Coitus; D003267:Contraception; D003276:Contraceptives, Oral; D005260:Female; D006069:Gonorrhea / Q000453:epidemiology / Q000209:etiology; D006801:Humans; D008297:Male; D012725:Sexual Behavior; D012749:Sexually Transmitted Diseases / Q000453:epidemiology*; D013334:Students; D013587:Syphilis / Q000453:epidemiology / Q000209:etiology; D014481:United States; D014526:Urethritis / Q000453:epidemiology / Q000209:etiology
D003276:Contraceptives, Oral