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Demographics of adolescent sexual behavior, contraception, pregnancy, and STDs.

The demographics of fertility-related behavior of youth ages 10-18 are reviewed. Data were collected from U.S. vital statistics, and birth rates, contraceptive use, sexual behavior, number and types of sexual partners, patterns of sexual initiation and sexual intercourse, and sexually transmitted diseases were examined. Despite data limitations, the demographic profile of adolescent sexual intercourse is striking. Age clearly is the single most important predictor of sexual debut.