This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fetus Placenta & Fetal Membrane, Subject name: Gynaecology & Obstetrics
The percentage of HbF at birth is: 
Select and explain. 
A. 20%, B. 50%, C. 70%, D. 90%
C: 70%
Answer: C: 70% 
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.