Introduction. Adolescent pregnancy in Peru is a public health problem that has high prevalence in regions such as Ica, and is considered as a cause of certain adverse outcomes to the health of the newborn as low weight and hyperbilirubinemia. Methods. A retrospective cohort was designed consisting of adolescent pregnant women between 13 and 19 years of age, which were divided into two groups: group 1 (<18 years of age) and group 2 (≥18 years of age). Results. A total of 481 adolescent pregnant women were evaluated, of which group 1 represented 65,3%. Newborns with low weight and hyperbilirubinemia were found in 3,3% and 18,9%, respectively. The bivariate analysis showed significant differences (p<0,001) between the median gestational age among mothers with newborns with normal weight and low weight, as well as in relation to the type of del...