Physiology Fetal haemoglobin has higher affinity for O2 due to A Decreased 2,3 DPG concentration B Reduced pH C Increased release of CO2 D Oxygen dissociation curve shifted to right 💡 Explanation Fetal haemoglobin has higher affinity for O2 due to ✓ Correct Answer: A. Decreased 2,3 DPG concentration