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Summary
No abstract available in PubMed .
Keywords:
Adolescent Pregnancy--prevention and controlAdolescentsAge FactorsAmericasBehaviorContraceptive AvailabilityDemographic FactorsDeveloped CountriesDeveloping CountriesEducationFertilityIecNorth AmericaNorthern AmericaOrganization And AdministrationPolicyPolitical FactorsPopulationPopulation CharacteristicsPopulation DynamicsPregnancyPremarital Sex BehaviorProgram ActivitiesProgramsReproductionReproductive BehaviorSex BehaviorSex EducationSocial PolicyUnited StatesYouth