Women 35-39 years old have a 2-3 fold higher risk of pregnancy-related death than women in their twenties, and the risk is even more dramatic for women 40 years and older. Objective: The aim of this study was to investigate the association of maternal age with risk of adverse pregnancy and mother outcomes in our setting, Tehran, Iran. Materials and Methods: In this retrospective observational hospital-based study, 538 nulliparous women were assessed. The association between maternal age and

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... aternal age and various pregnancy and neonatal outcomes were reported. Data were extracted from the database of Akbar Abadi hospital in Tehran from 2001-2006 records. Univariate and multiple logistic regression analyses were preformed to investigate the association between maternal age and various relevant outcomes. Results: Women aged 35 years or older had an increased percentages of gestational hypertension (18.8% vs 9.6%; p=0.02) and diabetes in pregnancy (3.7% vs 1.4%; p=0.08) compared with women younger than 35 years. There were no differences between the two age groups in Apgar score at 1 min, antepartum hemorrhage, preterm labor, PROM, fetal distress, perinatal death, and postpartum hemorrhage. Conclusion: Advanced maternal age was shown to be independently associated with low birth weight, preterm labor and rate of cesarean delivery.