Sexual and contraceptive knowledge, attitudes and behavior of male adolescents.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001290:Attitude; D002648:Child; D003075:Coitus; D003267:Contraception / Q000379:methods; D003268:Contraception Behavior; D005006:Ethnicity; D006801:Humans; D008297:Male; D012736:Sex Education; D012725:Sexual Behavior; D013997:Time Factors; D014481:United States