Adolescence term is widely described as a period in which an individual transfers form childhood to adulthood experiencing some biological, psychological and social changes. %90 of adolescents who account for % 30 of the World population live in developing countries. Nearly % 11 of all the births in the World are given by female adolescents between 15 and 19 every year. In our country %16 of adolescents who are between 15-19 are married.%16 of those who are over 19 are mothers or pregnant with their first child. Studies suggest that adolescent pregnancies are resulted from lack of education, en employment, lower socio-economic status, marrital status, shortage of knowledge about birth-control methods and insufficient information on fertility and sexual heath coming from families and schools. The risk factors of adolescent pregnancy are multiple and complex. Among the factors are abortion, pre-term labour, low birth-rate, pre-eclampsia, eclampsia, anemia, prolonged labour, prematüre rupture of membrane, fistüle, unadequate antenatal care, substance-use, sexuallytransmitted disease. In order to prevent adoloscence pregnancies, it is necessarry to spread the sexual health service, open the polyclinics for adolescents, prepare education programmes for adolescents and use the messmedia effectively to inform them.