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Context: High rates of unintended pregnancy and sexually transmitted diseases (STDs), including HIV infection, among adolescents are major public health concerns that have created interest in trends i...
A substantial number of adolescents, including many as young as 11, engage in high-risk sexual behavior. In a 1992 survey of 2,248 urban students in grades 6, 8 and 10, 45% of respondents, including 2...
According to a 1991 study of sexual behavior based on a random sample of heterosexual undergraduates at a Midwestern university, 80% of the males and 73% of the females had experienced vaginal or anal...

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