title: Menstruation problems in Nigerian students and sex education.
mesh_terms: D000293:Adolescent; D002648:Child; D005260:Female; D006801:Humans; D006920:Hygiene; D008572:Menarche / Q000502:physiology; D008598:Menstruation; D009549:Nigeria; D012572:School Health Services; D012736:Sex Education