Proceeding earlier researches achieved by Assistance Nucleus for the Self-care of Woman (ANSW) about menstruation aspects, we developed a work that studied concepts of 705 women about their menstruation. Bank of data from the ANSW gave informations obtained in employment at the Historic of Woman's Health in Vargem Grande Paulista. The concept more related was normal. Perhaps, it explains the data obtained in earlier works, where many women do nothing to relieve the painful symptoms of menstruation. The access to these proper concepts is important to elaborate a nursing assistance with quality, respecting convictions and valuables within the women's culture