Pregnancy in adolescence constitutes a high-risk obstetric situation and there is an obvious need for improvement in obstetric care for this age group. A retrospective study of 94 mothers, 17 years of age and under, was carried out at the Teaching Hospital of King Faisal University in order to assess the obstetric implications of adolescent pregnancy. This study has shown a significant increase in the incidence of low birth weight infants, breech presentation and preterm delivery. A significantly smaller number of adolescent mothers were found to have given birth spontaneously, vaginally. Adolescent primigravidas were noted to run a greater risk. It is imperative to institute a medical and educational service with comprehensive prenatal care for adolescent mothers in order to improve the outcome of their pregnancies.