Hemoglobin F (Fetal)
Hemoglobin F (fetal hemoglobin) is the predominant form in fetal development. In adults, it is normally less than 1-2%.
Category: Complete Blood Count
Also known as: hb f
Reference range: 0–2 % (Source: ABIM)
Standard unit: %
High values may indicate
Elevated Hb F in adults may indicate hemoglobinopathies such as thalassemia or hereditary persistence of fetal hemoglobin.
Low values may indicate
Normal levels.
Frequently asked questions
- What is a normal Hemoglobin F (Fetal) level?
- A typical reference range for Hemoglobin F (Fetal) is 0–2 % (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is Hemoglobin F (Fetal) measured in?
- Hemoglobin F (Fetal) is most commonly reported in %. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do Hemoglobin F (Fetal) reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track Hemoglobin F (Fetal) over time?
- Yes. Upload results from any lab and BloodId charts your Hemoglobin F (Fetal) over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: BloodId admin-reviewed
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