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MPV Blood Test
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Lab Tests

MPV Blood Test

The MPV (mean platelet volume) blood test measures the average size of your platelets to help diagnose bleeding disorders and bone marrow conditions.

Overview

Platelets (thrombocytes) are small blood cells produced in the bone marrow that help your blood clot. The MPV blood test measures the average size of these cells, which provides insight into how well they are functioning and how actively your bone marrow is producing them.

Why It Is Performed

This test is often part of a complete blood count (CBC). It may be ordered if you show symptoms of a platelet disorder, such as:

  • Prolonged bleeding from minor cuts
  • Frequent nosebleeds or bleeding from gums
  • Easy bruising or small red/purple spots on the skin
  • Abnormal vaginal bleeding
  • Weakness, dizziness, or headaches

Understanding Results

Results must be interpreted alongside platelet counts and other clinical data.

High MPV Result

Larger-than-average platelets may indicate that the bone marrow is producing new platelets rapidly to replace destroyed ones. This can be a sign of:

  • Thrombocytopenia (low platelet count)
  • Myeloproliferative diseases (blood cancers)
  • Preeclampsia
  • Heart disease or diabetes
  • Hemolytic anemia

Low MPV Result

Smaller-than-average platelets may indicate that the bone marrow is not producing enough new platelets. This can be a sign of:

  • Certain cancers
  • Aplastic anemia
  • Autoimmune diseases
  • Bacterial or viral infections
  • Alcohol use disorder (AUD)

Note that factors such as age, sex, lifestyle, and genetics can influence your MPV levels.

Frequently Asked Questions

low MPV with a normal platelet count suggests that the bone marrow is producing smaller, possibly older platelets. This pattern can be seen in conditions such as aplastic anemia, certain chronic infections, or alcohol‑related marrow suppression. Your doctor may order additional tests like a reticulated platelet count, iron studies, or a bone‑marrow biopsy to evaluate production capacity and rule out underlying disease.
Yes. Aspirin and other antiplatelet agents can affect platelet activation and may modestly lower MPV, while some hormonal contraceptives have been reported to raise MPV. Non‑steroidal anti‑inflammatory drugs (NSAIDs) can also influence platelet size indirectly. Inform your clinician about all medications and supplements before the test so results can be interpreted accurately.
high MPV indicates larger, younger platelets that are more reactive. Studies have linked elevated MPV with increased platelet aggregation, which can contribute to atherosclerotic plaque formation and thrombotic events. In people with diabetes or cardiovascular risk factors, a high MPV may signal a higher likelihood of heart attacks or strokes, prompting closer monitoring of blood pressure, lipid levels, and glycemic control.
Generally no fasting or special preparation is required because MPV is measured as part of a routine CBC. However, avoid vigorous exercise or recent trauma that could temporarily change platelet activation. If you are on a new medication or have had a recent infection, let the lab staff know, as these factors can affect the reading.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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