Thema
Journal Article
797
Contraceptive Agents, Female
303
Family Planning
299
Biology
297
Physiology
293
Research Methodology
279
Contraception
211
Urogenital System
197
Genitalia
196
Genitalia, Female
196
Diseases
159
Clinical Research
148
Uterus
136
Endocrine System
132
Reproduction
126
Studies
126
Estrogens
124
Contraceptive Agents
115
Research Support, Non-U.S. Gov't
114
Hormones
103
Treatment
100
Comparative Study
94
Examinations And Diagnoses
93
Levonorgestrel
91
Sterilization, Sexual
89
Contraceptives, Oral
88
Demographic Factors
84
Population
84
Developed Countries
83
Age Factors
82
5W7SIA7YZW
80
Female Sterilization
80
Contraceptive Agents, Progestin
77
Contraceptive Methods
70
Americas
68
Pregnancy
68
Progesterone
68
North America
66
United States
65
Contraceptive Methods--side effects
64
Review
64
Surgery
64
Northern America
63
Population Characteristics
61
4G7DS2Q64Y
59
Klinische Studie
59
Ethinyl Estradiol
59
Gynecologic Surgery
58
Population Dynamics
56
Oral Contraceptives
55
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