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Abstract
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Keywords:
AfricaArab CountriesBirth SpacingContraceptive UsageDemographic FactorsDeveloping CountriesDiseasesFamily PlanningFamily Planning, Behavioral MethodsFecundabilityFecundityFertilityFertility DeterminantsLactation, ProlongedMarriage PatternsNatural FertilityNorthern AfricaPopulationPopulation DynamicsPostpartum AmenorrheaPuerperal DisordersPuerperiumReproductionResearch ReportSexual AbstinenceSudan