This precocidade, most of the time, has influences even though cultural or for the medias, of this form an improper or even though absent orientation regarding contraceptive methods and of DST/AIDS occurs. This fact has contributed to become DST one of the biggest problems of public health of the world. In the considered countries industrialized, a new case of DST in each happens 100 people per year, and, in the developing countries, the DST are in five main causes of search for services of health (BORGES; MEDEIROS, 2004). The adolescents are considered as I highly publish vulnerable the risk behaviors to acquire sexually transmissible illnesses, such as plurality of sexual partners, improper use of condom, ingesta of alcoholic beverages and consumption of illicit drugs. Still, the same ones think to be invulnerveis to the infections, if of this form they finish if displaying the risk without presuming consequences (MURPHY et al., 2001 apud HISSES et al., 2005).
2.2 The sexually transmissible adolescence and illnesses Give credit that biological, psychic and social factors can lead to a bigger vulnerability of the adolescents to the DST? s. Taking in account the biological factor, the cylindrical epitlio of the col of the uterus in the adolescence meets displayed more and some microorganisms have opt to this fabric. Low the age of the menarca can unchain a precocious beginning of the sexual activity, increasing the infection possibility. As for the psychic scope, to the adolescence it is a phase of definition of the sexual identity with experimentation and variety of partners. The thought distracted still beginning in the adolescents makes with that invulnerveis are felt, and of this form if displaying the risks without presuming its consequences. They are unstable, susceptveis the group influences and familiar, to the times they are benefited of a good familiar relationship to protect them of the DST? s.