Menstruation and menstrual change: women in midlife.
D000328:Adult; D001294:Attitude to Health; D004412:Dysmenorrhea / Q000523:psychology; D005260:Female; D006306:Health Surveys; D006801:Humans; D008137:Longitudinal Studies; D008350:Manitoba; D008593:Menopause; D008598:Menstruation; D008875:Middle Aged; D012107:Research Design; D011795:Surveys and Questionnaires