Sexual activity in adolescence, the pregnancies, abortions and deliveries, STDs and the decisive role of the information about sex and sexuality are questions with great importance nowadays. The aim of present study is to find the changes in the sexual activity among the adolescents, in their motivation in beginning the sexual life, information that they have about sex and sexuality, in unwanted pregnancies, deliveries and about abortions in the last five years, following our former study. We present the data obtained from an inquire of 432 schoolboys and girls (aged 17-18), from 263 girls, aged 13 to 18, admitted for interruption of unwanted pregnancy in the Univ. Ob. & Gyn. Hospital in Sofia, Bulgaria, as well as from 132 girls after delivery in adolescence.