MPV blood test: what a high or low MPV means
What MPV is and why it is read with the platelet count
MPV shows the average size of the platelets (thrombocytes) in a blood sample. Platelets are small blood cells that clump together and help stop bleeding when a blood vessel is injured. When the bone marrow produces new platelets faster than usual — for example because more of them are being destroyed in the body — younger and larger platelets enter the bloodstream, so MPV rises. When platelet production in the bone marrow slows down, smaller platelets enter the blood and MPV falls.
This is why MPV is usually assessed not on its own but together with the platelet count (PLT) and the platelet distribution width (PDW). That combination helps distinguish whether the problem is excessive destruction of platelets or impaired production of them in the bone marrow. MPV is calculated automatically by the analyser when a full blood count is run — no extra sample needs to be taken.
A raised and a low MPV side by side
| Result | What it reflects | Causes listed by MedlinePlus |
|---|---|---|
| Raised MPV | Larger, younger platelets in circulation — most often the body destroys or uses up platelets faster than usual and the bone marrow compensates by producing new ones | Thrombocytopenia (from increased destruction), myeloproliferative diseases, preeclampsia in pregnancy, heart disease, diabetes mellitus, haemolytic anaemia |
| Low MPV | Smaller platelets in circulation — most often because production in the bone marrow has slowed down | Some cancers, a side effect of certain medicines on the bone marrow, aplastic anaemia, autoimmune diseases, bacterial or viral infections, inherited (genetic) conditions, alcohol use disorder |
When MPV is tested
- As part of a full blood count during a routine health check
- When bleeding from wounds takes a long time to stop, or nosebleeds happen often
- When bruises appear easily with no clear cause
- With unexplained weakness or tiredness
- When a full blood count has found an abnormal platelet count (PLT) — MPV helps assess the possible cause
How to prepare
- No special preparation is needed for an MPV test
- If other blood tests are ordered at the same time (glucose or a lipid panel, for example), you may need to avoid eating before the sample is taken — your doctor or the laboratory will tell you
The reference range for MPV
MedlinePlus, the source from the US National Library of Medicine, does not give specific reference numbers with units — the reference interval depends on the laboratory's analyser. How far laboratory intervals differ is shown by two Swedish examples: the Unilabs laboratory gives 9–12 fL for adults, while the Region Kalmar laboratory gives 9.3–12.1 fL for men and 9.1–11.9 fL for women older than 17. You will find the exact MPV interval on your own blood test report, next to your result. MPV is also most often not read in isolation: the cause of an abnormal value is established by a doctor who assesses the whole blood picture.
A raised MPV
A raised MPV means that larger, younger platelets are circulating in the blood — most often because the body is destroying or using them up faster than usual, and the bone marrow is compensating by producing new ones. According to MedlinePlus, this can be associated with thrombocytopenia, myeloproliferative diseases and other conditions.
Possible causes of a raised MPV:
- Thrombocytopenia (a reduced platelet count) — because of increased destruction of platelets in the body
- Myeloproliferative diseases (bone marrow disorders in which too many blood cells are produced)
- Preeclampsia during pregnancy
- Heart disease
- Diabetes mellitus
- Haemolytic anaemia (increased breakdown of red blood cells)
What is usually assessed alongside a raised MPV:
- The platelet count (PLT) and the platelet distribution width (PDW) — together they help assess the cause more precisely
- A review of the overall blood picture — whether there are other abnormalities
- Whether there are signs of bleeding or bruising
- When it is worth repeating the test so that the change over time can be seen
A low MPV
A low MPV means that smaller platelets are circulating in the blood — most often because their production in the bone marrow has slowed down. According to MedlinePlus, the causes may be cancers, the effect of certain medicines, aplastic anaemia or autoimmune diseases.
Possible causes of a low MPV:
- Some cancers
- A side effect of certain medicines on the bone marrow
- Aplastic anaemia (impaired blood cell production in the bone marrow)
- Autoimmune diseases
- Bacterial or viral infections
- Inherited (genetic) conditions
- Alcohol use disorder
What is usually assessed alongside a low MPV:
- The platelet count (PLT) — whether there is thrombocytopenia
- A full blood count and an assessment of bone marrow function, if the abnormality persists
- The medicines being taken — whether any of them could affect platelet production (to discuss with your doctor)
- When it is worth repeating the test to follow the change over time
Related pages
MPV comes from the same sample as the rest of the count, so it is worth reading alongside the full blood count and the platelet count. Other indices from the same report are covered separately: red blood cell count and haematocrit.
Full site in Lithuanian: proactiva.app
Frequently asked questions
›What is the normal MPV range?
MedlinePlus, the source from the US National Library of Medicine, does not give specific reference numbers with units — the reference interval depends on the laboratory's analyser. How far laboratory intervals differ is shown by two Swedish examples: the Unilabs laboratory gives 9–12 fL for adults, while the Region Kalmar laboratory gives 9.3–12.1 fL for men and 9.1–11.9 fL for women older than 17. You will find the exact MPV interval on your own blood test report, next to your result.
›How does MPV differ from the platelet count (PLT)?
PLT shows how many platelets are in the blood, while MPV shows their average size. The two are assessed together: a low PLT with a high MPV, for example, may indicate that the bone marrow is actively producing new, larger platelets to compensate for the loss.
›Do I need to avoid eating before an MPV test?
According to MedlinePlus, no special preparation is needed for an MPV test. You may need to avoid eating only if other tests are ordered at the same time that require a sample taken on an empty stomach.
›What does a raised MPV mean?
A raised MPV means that larger, younger platelets are circulating in the blood. According to MedlinePlus, this can be associated with thrombocytopenia, myeloproliferative diseases, preeclampsia, heart disease, diabetes or haemolytic anaemia — the cause is established by a doctor after assessing the whole blood picture.
›What does a low MPV mean?
A low MPV means that smaller platelets are circulating in the blood, most often because their production in the bone marrow has slowed down. According to MedlinePlus, this may be linked to some cancers, the effect of medicines, aplastic anaemia, autoimmune diseases or infections.
›Is the MPV test painful or risky?
MPV is determined from the same blood sample that is taken for a full blood count from a vein in the arm. According to MedlinePlus, the risk is minimal — there may be brief pain or a bruise at the puncture site, which passes quickly.
Sources
Related markers
This site is not an emergency service. If severe chest or head pain, breathlessness, confusion, difficulty speaking, heavy bleeding or another acute problem has come on suddenly — do not wait for tests, call 112.
This information is not a diagnosis and does not replace a consultation with a doctor. Reference ranges depend on the laboratory, your age and sex — always compare your result with the range printed on your own report.