Every sexual encounter presents the risk of getting a sexually transmitted disease, and unprotected sex risks pregnancy. According to the Centers for Disease Control and Prevention, 48 per cent of all American teens have had sex before graduating from high school. Thirty per cent of young women become pregnant at least once before they reach the age of 20, according to The National Campaign to Prevent Teen Pregnancy. Eighty per cent of these pregnancies are unintended. ""The Truth About Sexual Behavior and Unplanned Pregnancy, Second Edition"" is a trusted source teens can turn to for straightforward, up-to-date information about everything from contraception to the media's portrayal of sex. Providing a clear picture of teenage sexual behavior and its consequences, this helpful book offers sound advice to teenagers and encourages discussion with parents and peers. New and revised entries of this title include: Appropriate affection; Birth defects and risk-taking behaviors; Conception, pregnancy, and childbirth; Contraceptives; Dating; Diabetes and pregnancy; Drugs, alcohol, and sex; Hepatitis; The media and sex; Pelvic inflammatory disease; Prenatal care; Prevention of pregnancy; Sexual orientation; Sexual predators; Sexual violence; and, Sexually transmitted diseases.