Objective: To determine whether adolescent pregnancy is associated with increased risk for adverse pregnancy outcome. Study Design: Retrospective case-control study which enrolled 1460 singleton adolescent pregnancies and 2980 controls, delivered at Hacettepe University Hospital between January 1990 and January 1998. Results: Significantly higher rate of perinatal and severe perinatal complications were noted in adolescents. The presence of historical risks, multiparity, young age and lack of prenatal carl were significant predictors of these complications. Exclusion of them except for age, revealed comparable perinatal and severe perinatal complications in both groups. Conclusion: Adolescent women who receive adequate prenatal care are at no greater risk of an adverse obstetric outcome than adult women of a similar sociodemographic background. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved.