Argentina experimenta profundos cambios en materia de género, como corolario de la militancia del movimiento feminista, que, sumado a la lucha de diversas organizaciones sociales, ha logrado poner de relieve ciertas problemáticas actuales, ampliando derechos y oportunidades. La Salud Mental Perinatal, no puede mantenerse ajena ya que interviene en el embarazo, parto, puerperio y crianza. Objetivo: indagar mediante un estudio exploratorio descriptivo (N=300) la importancia asignada y el nivel de conocimiento de los/as alumnos/as de la Facultad de Psicología, UBA, previa y posteriormente a una experiencia electiva de Voluntariado Universitario, a través de un instrumento informatizado. Resultados: Antes de la intervención educativa, un 89% quisiera desempeñarse en esta rama de la Psicología, pero cree no tener la formación necesaria (95%), presentando nulo o escaso conocimiento sobre: género, cambios neurohormonales y psicosociales del embarazo, programación in útero; experiencia subjetiva de parto; V.O; puerperio, diagnóstico y lactancia. Después, la importancia asignada aumenta (97.2%) y también su percepción de nivel de formación (92.3%), constituyéndose como una experiencia reveladora, inedita y enriquecedora. Es necesario contar con formación obligatoria que posea una base sólida en ética, DDHH y género propiciando un trato humano y respetuoso basado en última evidencia disponible. Palabras clave Salud Mental Perinatal - Genero - Intervencion educativa - Voluntariado ABSTRACT ASSIGNED IMPORTANCE AND LEVEL OF KNOWN KNOWLEDGE ABOUT PERINATAL MENTAL HEALTH IN THE STUDENTS OF THE FACULTY OF PSYCHOLOGY OF THE UNIVERSITY OF BUENOS AIRES Argentina undergoes profound changes in the gender field, as a corollary to the militancy of the feminist movement, which, added to the struggle of various social organizations, has managed to highlight certain current problems, expanding rights and opportunities. Perinatal Mental Health cannot be kept apart as it intervenes in pregnancy, childbirth, the puerperium and upbringing. Objective: to investigate by means of a descriptive exploratory study (N = 300) the assigned importance and the level of knowledge of the students of the Faculty of Psychology, UBA, before and after an elective experience of University Volunteering, through a computerized instrument. Results: Before the educational intervention, 89% would like to work in this branch of Psychology, but they believe they do not have the necessary training (95%), presenting null or little knowledge about: gender, neurohormonal and psychosocial changes in pregnancy, inpatient programming uterus; subjective experience of childbirth; V.O; puerperium, diagnosis and lactation. Later, the importance assigned increases (97.2%) and also their perception of the level of education (92.3%), constituting a revealing, unprecedented and enriching experience. It is necessary to have compulsory training that has a solid foundation in ethics, human rights and gender, promoting humane and respectful treatment based on the latest available evidence. Keywords Perinatal Mental Health - Gender - Educational intervention -