title: Menstrual blood loss, haemoglobin and ferritin concentration of Beijing women wearing steel ring, VCu 200, and TCu 220c IUDs.
abstract: Menstrual blood loss (MBL), serum ferritin and whole blood cyanmethemoglobin were measured at pre- and 1, 3, 6, 12, 18 and 24th postinsertion cycles in 60 women wearing the Steel Ring, the Copper V (VCu 200) or the Copper T (TCu 220c). The MBL, incidence of menorrhagia and iron deficiency anemia were lower among users of the Steel Ring than among users of the Copper V and T. Anemia occurred later and the duration of menstruation was shorter with the Steel Ring than with the Copper T. There were no statistically significant differences between the Copper V and T.
mesh_terms: D000740:Anemia / Q000209:etiology*; D002681:China; D005260:Female; D005293:Ferritins / Q000097:blood*; D006454:Hemoglobins / Q000032:analysis*; D006801:Humans; D007434:Intrauterine Devices / Q000009:adverse effects / Q000145:classification*; D007435:Intrauterine Devices, Copper / Q000009:adverse effects; D008598:Menstruation; D013232:Steel
chemical_list: D006454:Hemoglobins; D013232:Steel; D005293:Ferritins