"Adolescent sexual activity is cause for concern because a number of diseases are transmitted from one person to another through sexual intercourse....

"Adolescent sexual activity is cause for concern because a number of diseases are transmitted from one person to another through sexual intercourse. Table 9.3 lists several of the most common types of sexually transmitted diseases (STDs). Some STDs, such as chlamydia and syphilis, are caused by bacteria; others, such as herpes and hepatitis B, are caused by a virus." Why do so many adolescents engage in risky sexual behavior, subsequently exposing themselves to STDs, and other dangerous factors?"Adolescents' sexual behavior is also troubling because among American adolescent girls who have ever had intercourse, approximately 1 in 6 becomes pregnant. The result is that nearly a half million babies are born to American teenagers annually."Why are some adolescents sexually active? Why do so few use contraceptives?Doesn't have word limit