<prompt> With oral iron therapy, rise in hb can be seen after1 week3 weeks4 weeks6 weeks  <response>: The improvement should be evident within 3 weeks of the therapy. After a lapse of few days, the hemoglobin concentration is expected to rise at the rate of about 0.7 gm100 mL per week. Reference: Textbook of Obstetrics; Sheila Balakrishnan; 2nd Edition; Page no: 287 