Medically Reviewed By
Dr. Srinivas
Consultant Pathologist
Pathology · Last reviewed: June 2026

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ANTI PHOSPHOLIPID ANTIBODY - IGM
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About this test
The Anti-Phospholipid Antibody (IgM) Test is a specialized blood test that detects Immunoglobulin M (IgM) antibodies directed against phospholipids and phospholipid-binding proteins. These antibodies are associated with Antiphospholipid Syndrome (APS), an autoimmune disorder that increases the risk of abnormal blood clot formation in arteries and veins, as well as pregnancy-related complications.
The Anti-Phospholipid IgM Test helps physicians investigate unexplained blood clots, recurrent miscarriages, stillbirths, and autoimmune diseases such as Systemic Lupus Erythematosus (SLE). It is commonly performed alongside other antiphospholipid antibody tests, including Anti-Cardiolipin Antibodies, Anti-β2 Glycoprotein I Antibodies, and Lupus Anticoagulant, to provide a comprehensive assessment.
Benefits of the Test
- Detects Anti-Phospholipid IgM antibodies with high accuracy.
- Helps diagnose Antiphospholipid Syndrome (APS).
- Assists in evaluating unexplained blood clotting disorders.
- Supports investigation of recurrent miscarriages and pregnancy complications.
- Helps assess autoimmune diseases associated with APS.
- Assists physicians in treatment planning and long-term monitoring.
Why Doctors Recommend This Test
Doctors may recommend the Anti-Phospholipid Antibody IgM Test for individuals with symptoms or medical conditions suggestive of APS, including:
- Deep vein thrombosis (DVT)
- Stroke or transient ischemic attack (TIA)
- Pulmonary embolism
- Recurrent miscarriages
- Pregnancy complications or stillbirth
- Unexplained arterial or venous blood clots
- Low platelet count (thrombocytopenia)
- Autoimmune diseases such as Systemic Lupus Erythematosus (SLE)
The test is frequently ordered together with Anti-Phospholipid IgG, Anti-Cardiolipin IgG/IgM, Anti-β2 Glycoprotein I Antibodies, Lupus Anticoagulant, ANA Profile, and other autoimmune investigations.
Preparation Before Test
- No fasting is required.
- Continue routine medications unless instructed otherwise by your physician.
- Inform your healthcare provider about blood-thinning medications, autoimmune disorders, recent illnesses, and pregnancy history.
- A blood sample is collected for laboratory analysis.
Normal Reporting Time
Reporting Time: Usually 2–5 working days, depending on laboratory processing protocols.
Who Should Take This Test?
This test is recommended for:
- Individuals with suspected Antiphospholipid Syndrome (APS).
- Patients with unexplained arterial or venous thrombosis.
- Women with recurrent miscarriages or pregnancy complications.
- Individuals with Systemic Lupus Erythematosus (SLE).
- Patients with unexplained low platelet counts.
- Individuals referred by rheumatologists, hematologists, or obstetricians.
Patient-Friendly Summary
The Anti-Phospholipid Antibody (IgM) Test is a blood test that detects IgM antibodies associated with Antiphospholipid Syndrome (APS), an autoimmune disorder that increases the risk of blood clots and pregnancy complications. APS can cause conditions such as deep vein thrombosis, stroke, pulmonary embolism, and recurrent pregnancy loss. This test helps doctors determine whether antiphospholipid antibodies are contributing to these health problems. It is usually performed as part of a comprehensive antiphospholipid antibody panel and interpreted along with your symptoms and other laboratory findings. The test is safe, requires only a blood sample, and generally does not require fasting.
Test FAQs
What is the Anti-Phospholipid Antibody (IgM) Test?
Why is this test performed?
Is fasting required before the test?
What sample is required?
What conditions can this test help diagnose?
Is this test performed with other antiphospholipid antibody tests?
Can this test help evaluate recurrent pregnancy loss?
How long does it take to receive results?
Is the Anti-Phospholipid Antibody (IgM) Test safe?
What should I do if my result is positive?
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