Fertility Journal Article 148 Demographic Factors 133 Population 133 Population Dynamics 133 Developing Countries 89 Asia 57 mehr ... Reproductive Behavior 55 Family Planning 53 Population Characteristics 52 Economic Factors 51 Research Methodology 48 Fertility Measurements 46 Age Factors 43 Developed Countries 37 Socioeconomic Factors 36 Americas 35 Behavior 34 Health 32 Eastern Asia 31 North America 27 Youth 27 Mortality 26 Adolescent Pregnancy 25 Adolescents 25 Contraception 25 Family And Household 25 Studies 25 Birth Rate 24 Nuptiality 24 weniger ...