Fetal hemoglobin has a higher affinity for oxygen than does adult hemoglobin. fetal hemoglobin has a higher affinity for oxygen than does adult hemoglobin.
This is True because of the Protein subunit Y, and because Subunit Y has fewer positive charges then Subunit B(Adult), the Fetal hemoglobin is 2,3-BPG is less electrostaticlly bound to the fetal hemoglobin.
Sorry if i sound nerdy, I love biology Hope this helps!!