MENARCHE By N., Sam M.S. - 35 is the first incidence or occurrence of menstruation in a female. This marks the 'official' onset of puberty. MENARCHE: "The menarche is a landmark which identifies the first time the process of menstruation occurs within a female." Related Psychology Terms ADOLESCENCE (Theories) HOMOSEXUALITY (Female) Dissociative Identity Disorder Discrimination and Mental Illness in the LGBT Population CLINICAL PSYCHOLOGY SPEECH DISORDERS CHILD PSYCHIATRY OEDIPUS COMPLEX (Oedipus Situation) SULLIVAN, HARRY STACK (1892- 1949) ANOVULATORY MENSTRUAL CYCLE Cite this page: N., Sam M.S., "MENARCHE," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/menarche/ (accessed July 3, 2022).