Common "Hemoglobin A2" queries answered by top doctors | iCliniq

Hemoglobin A2

Hemoglobin A2, a normal variant of hemoglobin A, contains two alpha and two delta chains. It occurs in low levels in normal blood. It appears in excess in beta-thalassemia. Elevated HbA2 also occurs in hyperthyroidism and folate deficiency. They help in the formation of alpha-globin protein.

Recently Answered Questions Recently Answered Questions

All the answers published in this website are written by verified medical doctors, therapists and health experts. The Content has been moderated by iCliniq medical review team before publication. Post your medical clarifications on iCliniq by choosing the right specialty and get them answered. Your medical queries will be answered 24/7 by top doctors from iCliniq.

Is my friend's beta thalassemia screening test seem normal?

Query: Hello doctor,My cousin of 30 years old got tested for beta thalassemia screening test. He got the result as hemoglobin A2 is 2.8 %, hemoglobin F is 0.2 %, and hemoglobin C, D, and S are not detected. Is this normal or has any complications?Please guide.  Read Full »


Dr. Prakash. H. M.

Answer: Hi, Welcome to icliniq.com. Based on your query, my opinion is as follows: The beta-thalassemia screening test appears to be normal. HbA2 levels (hemoglobin A2) are normally between 2 to 3.3% and HbF levels (fetal hemoglobin) are 0.1 to 1.2% for this age. Both are normal. The other hemoglobin typ...  Read Full »

Am I a beta-thalassemia carrier with the hemoglobin A2 level of 4.3?

Query: Hello doctor, I was just wondering for a second opinion on some results which I have received being 8+4 weeks pregnant. My FBC was normal but my hemoglobin A2 Level is 4.3 and it says the normal range is 1.5 to 3.6. But I just wanted to know if this definitely means I am a carrier of beta-thalassem...  Read Full »


Dr. Goswami Parth Rajendragiri

Answer: Hi, Welcome to icliniq.com. Your attached CBC report shows normal hemoglobin and MCV with RBC count is also within range (attachment removed to protect patient identity). I have calculated the Mentzer index as well which is also not in favor of thalassemia minor. Moreover, in the report also it has ...  Read Full »

ask-doctor-img Ask a Doctor Online

* Your first query consult is free!

Search for a Health Issue



Disclaimer: No content published on this website is intended to be a substitute for professional medical diagnosis, advice or treatment by a trained physician. Seek advice from your physician or other qualified healthcare providers with questions you may have regarding your symptoms and medical condition for a complete medical diagnosis. Do not delay or disregard seeking professional medical advice because of something you have read on this website. Read our Editorial Process to know how we create content for health articles and queries.