Earth & Environmental Sciences
pregnancy
92%
sexual behavior
88%
contraceptive use
85%
education
71%
youth
69%
infection
52%
condom use
51%
participation
48%
human immunodeficiency virus
35%
sex ratio
34%
suburb
31%
program
29%
logistics
24%
young
19%
services
17%
method
12%
test
10%
effect
6%
Medicine & Life Sciences
Sex Education
100%
Sexual Behavior
81%
China
67%
Contraceptive Agents
59%
Sexually Transmitted Diseases
55%
Unplanned Pregnancy
36%
Information Services
33%
Pregnancy
33%
Negotiating
33%
Sex Ratio
32%
Condoms
30%
Contraception
28%
Young Adult
22%
HIV
19%
Logistic Models
18%
Odds Ratio
18%
Control Groups
15%
Social Sciences
sex education
91%
China
50%
pregnancy
35%
suburb
14%
participation
14%
young adult
11%
town
11%
logistics
10%
regression
8%
adolescent
8%
Group
4%