Retrospectively 398 adolescent primiparas have been analyzed in respect of the process of pregnancy, antenatal complications, mode of delivery and perinatal outcome. The researched contingent was divided into 2 age groups--up to 15 years and between 16-18 years. The results obtained were compared to a control group of 398 primiparas at the age of 20-24 years. The results indicate that the process of adolescent pregnancy is related to a substantially higher relative share of some complications like anemia, premature rupture of the membranes and preeclampsia. The frequency of pre-term labor has essentially increased. A basic model of birth-giving is the vaginal delivery, and the duration of delivery of the adolescent does not differ from that of the adult primiparas. There is not a significant difference between the adolescent and the adult pregnant in the placental and in the early puerperal period. An increased frequency of the fetal retardation is missing at the adolescent pregnancy.