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Differences in Teenage Pregnancy Rates Among Five Developed Countries：The Roles of Sexual Activity and Contraceptive Use
Teenage Pregnancy Rates Contraceptive Use Sexual Activity
2009/9/16
Context: Adolescent pregnancy, birth, abortion and sexually transmitted disease (STD) rates are much higher in the United States than in most other developed countries.
Methods: Government statist...
Heterosexual Genital Sexual Activity Among Adolescent Males：1988 and 1995
Heterosexual Adolescent Males Sexual Activity
2009/9/15
Context: Researchers have paid little attention to adolescents' experience with genital sexual activity other than vaginal intercourse, even though oral and anal intercourse expose youth to the risk o...