This cross-sectional descriptive trial was conducted using information on the spot; encuestandose included a total of 1156 adolescent girls in the age group of 15-19 years old; population that was assigned proportionately using simple random sampling with a maximum error of 2% to the groups corresponding to the secondary schools, colleges and universities in the district of Tarapoto in order to know some aspects of reproductive health of our teenagers. Before starting the field traajo were trained people who participated in the data collection, test pilot fectuo a). For the size and adequate representative sample. b). To assess the adequacy and clarity of each question and identify problem questions. The registration forms were anonymous and the singling out of the sample is allowed. It was found that 62.12% of adolescents are sexually active; the average age of first sexual intercourse ...