Gynaecology & Obstetrics Fetus Placenta & Fetal Membrane 16ef56a7 The percentage of HbF at birth is: A 20% B 50% C 70% D 90% High-Yield Explanation Ans. is c, i.e. 70%Ref NelsonDuring Intrauterine life HbF=90%At birth HbF=70%At 6 months after birth HbF=1-2%In Adults (HbF) is in traces.