title: Clinical significance of hemoglobin levels in users of the IUD--a 4 year study.
mesh_terms: D005260:Female; D006454:Hemoglobins; D006801:Humans; D007434:Intrauterine Devices / Q000009:adverse effects*; D008599:Menstruation Disturbances / Q000175:diagnosis* / Q000209:etiology; D011247:Pregnancy
chemical_list: D006454:Hemoglobins