Summary: Almost Half of all 15-19 year olds in the U.S. have had sex at least once.

By the time teens reach 19 years old, seven in 10 teens have engaged in sexual intercourse.

  • In September of 2006 the Alan Guttmacher Institute published a number of shocking facts on American teens' sexual and reproductive health. Facts included: Ten percent of young women aged 18-24 who had sex before age 20 reported that their first sex was involutary; Human Papillomavirus (HPV) infections account for about half of STIs diagnosed among 15-24 year olds each year; 82% of teen pregnancies are unplanned (they account for about one in five of all unintended pregnancies annually); 7% of teen mothers receive late or no prenatal care; and babies born to teens are more likely to be low birth weight than those born to women in their 20s and 30s.1

1Facts on American Teens' Sexual and Reproductive Health, Guttmacher Institute, 2006.

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