Menstrual patterns in Chinese women.
D000293:Adolescent; D000328:Adult; D002648:Child; D002681:China; D004412:Dysmenorrhea / Q000453:epidemiology; D005006:Ethnicity; D005260:Female; D006801:Humans; D008598:Menstruation; D008875:Middle Aged; D012424:Rural Population; D011795:Surveys and Questionnaires; D014505:Urban Population