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Summary
No abstract available in PubMed .
Keywords:
Acquired Immunodeficiency SyndromeAdolescent PregnancyAdolescentsAdolescents, FemaleAdolescents, MaleAge FactorsAmericasBehaviorCoitusContraceptionContraceptive UsageDemographic FactorsDeveloped CountriesDiseasesFamily PlanningFertilityHiv InfectionsHomosexualsInfectionsLiterature ReviewNorth AmericaNorthern AmericaPopulationPopulation CharacteristicsPopulation DynamicsPremarital Sex Behavior--changesPsychological FactorsReproductionReproductive BehaviorReproductive Tract InfectionsSex BehaviorSexually Transmitted DiseasesUnited StatesViral DiseasesYouth