Treatment Parenteral iron: iron dextran Suitable for: intolerance, malabsorption, Severe gastrointestinal disease, late phase of pregnance Dose: total amount(mg)=[150-patient's Hb(g/L)× weight(kg)×0.33 PreventionTreatment Parenteral iron：iron dextran Suitable for：intolerance,malabsorption,severe gastrointestinal disease,late phase of pregnance Dose: total amount(mg)＝[150-patient`s Hb(g/L) ]×weight(kg)×0.33 Prevention