Thema
Age Factors
Journal Article
11.482
Population
10.699
Demographic Factors
10.606
Population Characteristics
10.601
Research Methodology
5.918
Developing Countries
5.588
Population Dynamics
5.368
Youth
5.117
Developed Countries
4.885
Family Planning
3.923
Diseases
3.812
Studies
3.282
Economic Factors
3.262
Americas
3.250
Biology
3.025
Behavior
3.005
North America
2.858
Fertility
2.762
Health
2.647
Contraception
2.626
Adolescents
2.622
Asia
2.533
Socioeconomic Factors
2.480
Northern America
2.373
Physiology
2.345
Research Report
2.282
United States
2.273
Europe
1.827
Socioeconomic Status
1.718
Reproduction
1.693
Research Support, Non-U.S. Gov't
1.687
Mortality
1.680
Family And Household
1.674
Africa
1.598
English Abstract
1.591
Child
1.573
Education
1.550
Fertility Measurements
1.456
Delivery Of Health Care
1.444
Measurement
1.434
Psychological Factors
1.416
Family Characteristics
1.406
Parity
1.368
Africa South Of The Sahara
1.321
Reproductive Behavior
1.302
Organization And Administration
1.293
Sex Factors
1.243
Comparative Study
1.233
Adolescents, Female
1.212
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