Data are presented from a questionnaire study on the sexual activity of Bulgarian teenagers as well information on the contraceptive methods chosen by them. The authors inform in short about the activities of the Bulgarian Association for Family Planning (BAFP). Analyses are made of the data obtained from BAFP card-index for the last two years. Information is given on the number of observed cycles, types of applied contraceptive method, aims of their application (contraception, treatment of acne, menstrual disturbances etc.). The attention was concentrated on the third generation contraceptive pills Cilest, on the age of patients, as well as on the adverse effects--change in blood pressure, body-weight changes, intermenstrual bleeding, hairiness, breast problems, paraclinical changes, etc. Underlined is the number of teenagers who seen the BAFP help on problems of contemporary contraception. The observed cycles show a very small percentage of adverse effects with hormonal contraception, mainly during the first 2 of 3 cycles, with predominance of intermenstrual bleeding. No body-weight changes or increased hairiness were observed.