Americas Journal Article 237 North America 182 Developing Countries 160 Developed Countries 141 Latin America 124 Family Planning 112 mehr ... Population 107 Demographic Factors 105 Northern America 105 Economic Factors 100 United States 100 Health 79 Organization And Administration 74 Population Characteristics 74 Programs 70 Diseases 68 South America 63 Contraception 62 Population Dynamics 59 Organizations 56 Age Factors 55 Behavior 51 Research Methodology 51 Education 48 Youth 47 Delivery Of Health Care 45 Program Activities 45 Adolescents 41 Viral Diseases 41 weniger ...