Menarcheal experience, beliefs about and attitudes toward menstruation in Mexico: Changes in the last 20 years.

We explored how menarcheal experiences and attitudes toward menstruation of Mexican adolescents have changed in the last 20 years. Two questionnaires were applied to female adolescent students, and the results were compared with those obtained in 2002-3 when adolescents of the same ages were surveyed using the same questionnaires. Although some aspects of menstrual education have not changed, the secrecy surrounding menstruation has diminished. In contrast, the belief that menstruation is disabling and keeps women from their normal activities has increased. It is important that adolescents receive adequate preparation about psychosocial and physical aspects of the menstrual cycle.