professional, and you don't have to think about it for three or five or even ten years. >> reporter: the american academy of pediatrics is now saying the first line of contraceptive choice for adolescents should be i.u.d.s and other long-acting forms of birth control such as hormonal implants or injections. dr. rebecca o'brien is part of the committee. >> the research has shown they're just as safe in young adults as older women, and no long-term risks associated with them. >> reporter: mistakes are often made. the pill is 99.7% effective if used perfectly, but only 91% with typical use. condoms are only 80%. an i.u.d. is 99% effective with typical use. gynecologist dr. gillian deen is