<prompt> 28 year old G3 P2 at 16 weeks gestation reports extreme fatigue and her hemoglobin concentration is 7.5g dL MCV is markedly elevated and measures 12.4 fL. Her peripheral blood smear is shown below. What is most likely etiolgyIron deficiencyVitamin B6 deficiencyFolic acid deficiencyVitamin B12 deficiency  <response>: During pregnancy, megaloblastic anemia is more due to folic acid deficiency than vitamin B12 deficiency. 