Background: Teenage pregnancy is a public health issue that affects teenage mothers and community at large-scale. Teenage pregnancy has side effects for mother and embryo. The present study compared pregnancy outcomes in teenage and primiparas.

Methods: Present study was a descriptive-comparison with 382 pregnant women in two groups, 122 teenage mothers and 260 primiparas above 20 years old admitted to Kowsar Teaching Hospital in Qazvin in 2012-2013 using convenience sampling. Data gathering tool was a questionnaire with three sections including demographics, pregnancy and delivery information, and neonatal outcomes. Data were analyzed using Chi square test and t-test through SPSS v. 16.

Results: Results showed that weight gain in pregnancy and complications such as abruption, preeclampsia, placenta previa, miscarriage and IUGR in two groups were no significantly different (p>0.05). Vomiting, insomnia and urinary tract infection were more frequent in teenage pregnancy but diabetes and pyelonephritis were higher in primiparas (p=0.04). Post-partum was similar in both groups. Duration of delivery was significantly shorter and vaginal delivery was higher in teenage pregnancy (p=0.04).