A fetus has high levels of hemoglobin F. Following birth the levels gradually decline, with very little hemoglobin F found in the adult
Age in Months
Lower Limit for Hemoglobin F
Upper Limit for Hemoglobin F
0
70
90%
1
50
75%
2
25
60%
3
10
35%
4
5
20%
6
8%
9
5%
12
2%
adult
very low
Percent Hemoglobin F at Upper Limit of Normal
0 to 2 months
90 - (15 * (age in months))
2 to 6 months
(-0.368 * ((age in months)^3)) + (7.963 * ((age in months)^2)) - (57.53 * (age in months)) + 146.1
6 to 12 months
14 - (age in months)
To read more or access our algorithms and calculators, please log in or register.
Specialty: Hematology Oncology, Clinical Laboratory
