Red Blood Cell Mean Cell Volume (MCV)
What It Is
MCV measures the average size of red blood cells, helping to classify different types of anaemia.
Why It Matters
MCV is a key parameter in distinguishing between iron deficiency (small cells) and B12/folate deficiency (large cells) anaemia.
If Levels Are High
High MCV (macrocytic) may indicate vitamin B12 or folate deficiency, liver disease, or hypothyroidism.
If Levels Are Low
Low MCV (microcytic) typically indicates iron deficiency or thalassaemia trait.
Preparation
No special preparation required.
How Often to Test
As part of a full blood count.
Important Disclaimer
This information is for educational purposes only and does not constitute medical advice or diagnosis. Results should be interpreted in clinical context by a qualified healthcare professional. If you have severe symptoms or urgent concerns, seek urgent medical help.