Hello and welcome to HCM, Anemia is common in menstruating females. Blood loss during menstruation causes loss of iron and thus anemia. Iron deficiency leads to low hemoglobin and low iron stores in body. Your test report has shown low iron level in body. Thus, your doctor has prescribed iron supplements (ferrous sulphate). The treatment should be followed for atleast 3 months before improvement in iron levels can be expected. Get the iron test repeated after completion of iron replacement and consult your treating doctor with the results. If iron level has improved, the supplements can be stopped, however, if iron still remains low, iron treatment may have to be repeated. Thanks and take care Dr Shailja P Wahal