OBJECTIVES: Learn about the perinatal complications and birth pathways in newborns of early and late adolescent mothers. MATERIALS AND METHODS: A basic, observational, prospective, cross- sectional, descriptive study of 177 pregnant adolescents assisted at the Minsa II-2 Tarapoto Hospital during the period of July-November 2015, it has been evaluated the way of birth and perinatal complications. Adolescents were classified as early (10-14 years old) and late (15-19 years old). RESULTS: The 40.1% of births in the study period were from newborns of adolescent mothers. There was a total of 177 births in adolescents, 10.7% of them, belonging to early adolescence. Low birth weight was the most frequent perinatal complication with 15.3% of newborns, followed by prematurity with 13% and SDR with 11.3%, 9.6% had neonatal sepsis, 7.3% with hypoglycemia, and depression at birth was present in 6.2%...