Gynaecology & Obstetrics Which of the following is the most sensitive for detection of iron depletion in pregnancy: March 2013 A Serum iron B Serum transferrin C Serum erythropoitein D Serum ferritin 💡 Explanation Which of the following is the most sensitive for detection of iron depletion in pregnancy: March 2013 ✓ Correct Answer: D. Serum ferritin