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Abstract
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Keywords:
AmericasAttitudeBasal Body Temperature MethodBehaviorBiologyCatholicismCervical Mucus MethodChristianityConservatismContraceptionContraception FailureContraceptive EffectivenessContraceptive UsageCost Benefit AnalysisDemographic FactorsDeveloped CountriesDeveloping CountriesFamily PlanningFamily Planning EducationFamily Planning, Behavioral MethodsFertilityHusband-wife CommunicationLiterature ReviewNatural Family PlanningNorth AmericaNorthern AmericaOpposition To Family PlanningPolicyPolitical FactorsPopulationPopulation DynamicsPopulation PolicyPronatalist PolicyPsychological FactorsReligionReproductive BehaviorRhythm Method, CalendarRisk FactorsSocial PolicySympto-thermal MethodTheoretical EffectivenessUnited States