MCV (Mean Corpuscular Volume)
Sourced reference. This entry is compiled from MedlinePlus and is reproduced for reference rather than written by eMed7. Reference ranges differ between laboratories — always read a result against the range printed on your own report.
MCV stands for mean corpuscular volume. An MCV blood test measures the average size of your red blood cells. Red blood cells carry oxygen from your lungs to every cell in your body.
Your cells need oxygen to grow, reproduce, and make energy. If your red blood cells are too small or too large, it could be a sign of a blood disorder such as anemia, a lack of certain vitamins, or other medical conditions.
Why this test is done
Your health care provider may order a complete blood count, which includes an MCV test, as part of your routine checkup. You may also have the test if you have a chronic (long-lasting) condition that could lead to anemia or if you have symptoms of anemia, which could include:
- Shortness of breath
- Weakness or fatigue
- Headache
- Dizziness
- Arrhythmia (a problem with the rate or rhythm of your heartbeat)
How to prepare
You don't need any special preparations for an MCV blood test. If your provider has ordered more tests on your blood sample, you may need to fast (not eat or drink) for several hours before the test. Your provider will let you know if there are any special instructions to follow.
Sample type
Blood
Other names for this test
CBC with differential, Mean Cell Volume, Mean Corpuscular Volume
Full library entry
Reference ranges, sample type, and citations for this marker.
Open in the biomarker librarySources
- %20https://www.nhlbi.nih.gov/health/thalassemia/diagnosis— MedlinePlus
- ncbi.nlm.nih.gov/books/NBK545275— MedlinePlus
- nhlbi.nih.gov/health/anemia/iron-deficiency-anemia— MedlinePlus
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Educational content only. This entry describes what a test measures and how published reference ranges are defined. It is not a diagnosis, does not interpret your personal results, and is not a substitute for a qualified doctor.