What are the common factors that cause teenage pregnancy? Do teenage girls use contraception effectively?

Answers will vary. Adolescent girls typically get little advice in school or at home about how to deal with boys' sexual advances. Another reason is failure to use contraception. Many adolescent girls, especially younger adolescents, do not have access to contraceptive devices. Among those who do, fewer than half use them reliably. Some teenage girls purposefully get pregnant to try to force their partners to make a commitment to them. Some are rebelling against their parents or the moral standards of their communities. However, most girls are impregnated because they and their partners miscalculate the odds of getting pregnant.