The main objective of this study is to compare the tolerability of oral liposome iron versus oral ferrous sulfate in pregnant women diagnosed with iron deficiency anemia during the second trimester of pregnancy, based on the occurrence of side effects and adherence to treatment. A low-level clinical trial of pregnant women is proposed for this purpose, since the investigational drugs are authorized and used in accordance with the terms of the marketing authorization, and their use is supported by published scientific data on the safety and efficacy of the stated drugs. Moreover, no additional diagnostic procedures involving an additional risk or burden for the safety of the subjects will be carried out.