Thema
Journal Article
2.503
Follow-up studies
1.113
follow-up studies
845
Research Support, Non-U.S. Gov't
721
Follow-up Studies
569
Follow-up study
519
Studies
512
Research Methodology
490
follow-up study
346
Family Planning
322
Follow-Up Studies
316
Population
256
Demographic Factors
253
Developing Countries
243
Diseases
238
Contraception
188
Research Support, N.I.H., Extramural
187
Biology
179
Population Characteristics
174
Multicenter Study
163
Age Factors
162
Population Dynamics
160
Comparative Study
159
Developed Countries
157
Medicine
145
Physiology
144
Randomized Controlled Trial
144
Research Report
143
R
140
Humans
138
Behavior
137
humans
129
Asia
128
Health
123
Americas
117
Mortality
113
Observational Study
113
Surgery
106
Sterilization, Sexual
103
Female
102
risk factors
101
Reproduction
100
Male
99
Medicine & Public Health
98
Psychological Factors
98
Contraceptive Usage
97
Examinations And Diagnoses
96
North America
96
Biomarkers
95
Adult
94
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