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Keywords:
Age Specific Fertility RateAsiaBirth RateCohort AnalysisCross Sectional AnalysisDemographic AnalysisDemographic FactorsDeveloping CountriesFamily PlanningFecundityFertilityFertility MeasurementsFertility RateHealthLactationNatural FertilityNutritionPeriod AnalysisPhilippinesPopulationPopulation DynamicsPuerperiumReproductionResearch MethodologyRetrospective StudiesSocial Change--side effectsSoutheastern AsiaStatistical StudiesStudies