title: Electro-cardiographic and serum electrolyte changes during menstrual cycle.
mesh_terms: D000293:Adolescent; D000328:Adult; D004562:Electrocardiography; D004573:Electrolytes / Q000097:blood*; D005260:Female; D006801:Humans; D008598:Menstruation
chemical_list: D004573:Electrolytes