Fetal Hemoglobin

**Definition:** The major component of hemoglobin in the fetus. This HEMOGLOBIN has two alpha and two gamma polypeptide subunits in comparison to normal adult hemoglobin, which has two alpha and two beta polypeptide subunits. Fetal hemoglobin concentrations can be elevated (usually above 0.5%) in children and adults affected by LEUKEMIA and several types of ANEMIA.

**Tree numbers:** - D12.776.124.400.303 - D12.776.422.316.762.320

**Synonyms:** - Hemoglobin F