Gynaecology & Obstetrics Which of these is true of fetal haemoglobin? A HbF binds more avidly to to 2,3 DPG B HbF is completely replaced by HbA at the time of bih C HbA first appears in fetal blood at 11 weeks when bone marrow stas hematopoiesis D With Sickle cell anemia very low amounts of HbF is produced 💡 Explanation Which of these is true of fetal haemoglobin? ✓ Correct Answer: C. HbA first appears in fetal blood at 11 weeks when bone marrow stas hematopoiesis