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Family PlanningPlanning ProgramInduced AbortionFertility DeclineSex Ratio at BirthTotal Fertility RateMarried WomenFamily HealthDemographic TransitionSon PreferenceContraceptive FailureFamily DevelopmentDemographic AgingFamily Life CycleSocioeconomic VariablesDeveloping CountriesMaternal and Child HealthContraceptive MethodsSocial AffairsAppropriate Fertility Level