Martillo Murillo, Angelus Luis, and Jazmin Elizabeth Anchundia Casanova. “Emotional State of Adolescent Mothers in Latin America before and After Childbirth. Systematic Review”. Revista Universidad De Guayaquil, vol. 140, no. 2, July 2026, pp. 134-52, https://doi.org/10.53591/revug.v140i2.2972.