title: Thinness, delayed menarche, and irregular cycles.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D006801:Humans; D008572:Menarche; D008599:Menstruation Disturbances / Q000209:etiology*; D013851:Thinness / Q000150:complications / Q000503:physiopathology*