The present work was elaborated emphasizing our concern with the world-wide problem of the teenager with regard mainly to the increasing frequency of teenager pregnancy in other countries, as well as with the lack of specific assistance to this group in Porto Alegre. To this effect a retro-pesctive study was made, based on 1.597 case histories of expectant women assisted in a teaching Hospital in our city, among whom the convincing evidence of 12.39 per cent pregnant adolescents was found. It has been our intention, through this work, to characterize the problem posed by the pregnant teenager in relation to: Matital status, occupation, age for menarche, beginning of sexual intercourse, pregnancies and parity, abortion, contraceptive methods, prenatal visits and nursie performance in providing care for the pregnant adolescent.