Original articles, 056–061 | DOI: 10.53260/EGO.2020111 Impact of levonorgestrel-releasing intrauterine system on levels of serum hemoglobin and ferritinin women with a normal and elevated body mass:1-year follow-up Ineta Vasaraudze, Renars Erts, Dace Rezenberga, Aivars Lejnieks