Thema
Age Factors
11.857
Journal Article
11.773
Population
10.702
Demographic Factors
10.606
Population Characteristics
10.600
Research Methodology
5.918
Developing Countries
5.587
Population Dynamics
5.368
Youth
5.117
Developed Countries
4.884
Family Planning
3.923
Diseases
3.810
Studies
3.289
Economic Factors
3.262
Americas
3.249
Biology
3.027
Behavior
3.005
North America
2.857
Fertility
2.762
Health
2.648
Contraception
2.627
Adolescents
2.623
Asia
2.533
Socioeconomic Factors
2.478
Northern America
2.373
Physiology
2.345
Research Report
2.282
United States
2.270
Europe
1.827
Research Support, Non-U.S. Gov't
1.734
Socioeconomic Status
1.718
Mortality
1.700
Reproduction
1.696
Family And Household
1.674
Africa
1.601
English Abstract
1.592
Child
1.569
Education
1.559
Fertility Measurements
1.456
Delivery Of Health Care
1.444
Measurement
1.434
Psychological Factors
1.416
Family Characteristics
1.406
Parity
1.372
Africa South Of The Sahara
1.321
Reproductive Behavior
1.302
Organization And Administration
1.293
Comparative Study
1.248
Sex Factors
1.241
Adolescents, Female
1.212
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