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 etiolgy
During pregnancy, megaloblastic anemia is more due to folic acid deficiency than vitamin B12 deficiency.
Iron deficiency
Vitamin B6 deficiency
Folic acid deficiency
Vitamin B12 deficiency