A feature of fetal RBC in adult –
Features of fetal RBCs

It contains less 2,3 DPG
It is alkali denaturation resistant
It is larger in size than adult RBC → Larger in volume
It contains less iron than adult RBC
Life span is less.
Alkali denaturation resistant
Small in size
Has more 2,3 DPG level
More iron than adult RBC