Thema
Age Factors
28
Journal Article
25
Population Characteristics
20
Demographic Factors
19
Population
19
Developed Countries
18
Family Planning
18
Australia
16
Oceania
16
Contraception
13
Youth
12
Contraceptives, Oral
11
Research Methodology
11
Biology
9
Adolescents
8
Behavior
8
Developing Countries
8
Diseases
8
Physiology
7
Studies
7
Contraceptive Methods
6
Contraceptive Methods--side effects
5
Measurement
5
Oral Contraceptives--side effects
5
Population Dynamics
5
Research Support, Non-U.S. Gov't
5
Contraceptive Agents
4
Evaluation
4
Examinations And Diagnoses
4
Sex Behavior
4
Sterilization, Sexual
4
Treatment
4
Acceptor Characteristics
3
Adolescents, Female
3
Cancer
3
Child
3
Contraceptive Agents, Female
3
Delivery Of Health Care
3
Europe
3
Health
3
Health Personnel
3
Letter
3
Mortality
3
Neoplasms
3
Northern Europe
3
Oral Contraceptives
3
Parity
3
Political Factors
3
Psychological Factors
3
Reproduction
3
mehr ...