Antiphospholipid Syndrome

The antiphospholipid syndrome tests can help identify the three abnormal antiphospholipid antibodies: anticardiolipin, beta-2 glycoprotein I (β2GPI), and lupus anticoagulant that increases the risk of blood clots. Order from Ulta Lab Tests today, with confidential results available in 24 to 48 hours online.      

Below the list of tests is a guide that explains and answers your questions on what you need to know about antiphospholipid syndrome tests, along with information on antiphospholipid syndrome, signs, symptoms, and diagnosis.

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The Beta-2-Glycoprotein I IgG IgA IgM Antibodies Test detects autoantibodies linked to antiphospholipid syndrome (APS), a disorder that increases risk of abnormal blood clotting. Measuring all three antibody classes provides a thorough evaluation of immune activity. Elevated results may be associated with recurrent miscarriages, venous or arterial thrombosis, and autoimmune conditions, supporting diagnosis and monitoring of clotting-related disorders.


The Beta-2-Glycoprotein I IgA Antibody Test detects IgA antibodies targeting beta-2 glycoprotein I, helping identify autoimmune conditions and clotting disorders. Positive results may indicate antiphospholipid syndrome, thrombotic risk, or pregnancy complications. This test provides insight into immune activity, vascular health, and systemic conditions linked to abnormal coagulation and inflammation.

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The Beta-2-Glycoprotein I IgG Antibody Test detects IgG antibodies targeting beta-2 glycoprotein I, helping assess autoimmune disorders and clotting risk. Positive results may indicate antiphospholipid syndrome, pregnancy complications, or thrombotic conditions. This test provides insight into vascular health, immune response, and systemic disorders related to antibody activity and coagulation balance.

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The Beta-2-Glycoprotein I IgM Antibody Test detects IgM antibodies targeting beta-2 glycoprotein I to help assess autoimmune activity and clotting disorders. Positive findings may suggest antiphospholipid syndrome, thrombotic risk, or recurrent miscarriage. This test provides insight into vascular health, immune regulation, and systemic disorders tied to antibody activity and coagulation balance.

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The Cardiolipin IgA Antibody Test detects IgA antibodies to cardiolipin, helping assess clotting disorders, autoimmune disease, and vascular complications. High levels are often linked to antiphospholipid syndrome, pregnancy loss, or thrombotic conditions. This test provides insight into immune activity, coagulation balance, and systemic disorders influenced by antibody-mediated vascular dysfunction.

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The Cardiolipin IgG Antibody Test detects IgG antibodies to cardiolipin, often associated with autoimmune disease. Abnormal results may indicate antiphospholipid syndrome, blood clotting disorders, or pregnancy complications. This test provides insight into thrombotic risk, vascular health, systemic inflammation, and immune activity linked to autoimmune conditions and antibody-mediated disease.

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The Cardiolipin IgM Antibody Test measures IgM antibodies linked to antiphospholipid syndrome and autoimmune disorders. It helps evaluate unexplained blood clots, recurrent miscarriages, or abnormal clotting events. By detecting immune system activity against phospholipids, this test supports the assessment of vascular health, autoimmune activity, and risks related to thrombosis or systemic lupus erythematosus.

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The Lupus Anticoagulant Evaluation with Reflex measures PTT-LA and dRVVT to detect lupus anticoagulant antibodies, which increase risk of abnormal clotting. Reflex tests such as Hexagonal Phase Confirmation, Thrombin Clotting Time, and dRVVT mixing are performed if results are prolonged. Doctors use this panel to evaluate unexplained clotting, recurrent miscarriage, or autoimmune disease, aiding in diagnosis of antiphospholipid syndrome.

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Also Known As: LA Test, LAC Test, Lupus Anticoagulant Panel Test, Lupus Inhibitor Test, LA Sensitive PTT Test, PTT-LA Test,


The Complete Blood Count with Differential and Platelets Test is a comprehensive blood test that checks red blood cells, white blood cells, hemoglobin, hematocrit, and platelets. The differential analyzes types of white blood cells to detect infections, anemia, clotting abnormalities, immune conditions, and certain cancers. This essential test is often ordered for routine health exams, diagnosis, and monitoring treatment progress.

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Also Known As: CBC Test, CBC with Differential and Platelets Test, CBC w/Diff and Platelets Test, Full Blood Count Test, Complete Blood Count Test

The Activated Partial Thromboplastin Time (aPTT) Test measures how long it takes blood to clot, evaluating clotting factors and overall coagulation function. Abnormal results may indicate bleeding disorders, hemophilia, liver disease, or clotting factor deficiencies. Doctors also use this test to monitor patients on heparin therapy. Results provide essential insight into blood clotting, bleeding risk, and treatment management for safe medical care.

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Also Known As: aPTT Test, PTT Test

The Prothrombin Time with INR Test measures how long it takes blood to clot and calculates the international normalized ratio (INR) for accuracy. It is commonly used to monitor patients on blood-thinning medications like warfarin and to evaluate bleeding disorders, liver disease, or vitamin K deficiency. Doctors order this test to investigate easy bruising, frequent nosebleeds, or prolonged bleeding and to ensure safe and effective anticoagulant therapy.

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Also Known As: PT with INR Test


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It has been reported that, on average, 274 people are killed by blood clots every day in the US alone. There is a veritable laundry list of risk factors associated with blood clot formation. Some of them, like spending too much time sitting down, recent surgery, or obesity, are pretty obvious.

But one of the most subtle potential causes of blood clots is an autoimmune disorder known as antiphospholipid syndrome (APS), which can only be diagnosed by performing antiphospholipid syndrome tests.

To learn more about this potentially deadly condition—and the absolute best way to test for it—keep reading.

About Antiphospholipid Syndrome

Antiphospholipid syndrome (APS), which may also be referred to as Hughs syndrome, lupus anticoagulant disease, or anticardiolipin antibody (aCL) syndrome, is an autoimmune disease. This type of disease causes your body to go to war against itself.

When it's functioning as it should, your immune system identifies threats posed to your body from the outside (e.g., bacteria, viruses, foreign bodies). It then responds to them by releasing the appropriate countermeasure. This can range from triggering a fever to deploying specialized cells that physically destroy the threat.

This all goes catastrophically wrong when the immune system's means of identifying a threat—proteins known as antibodies—marks some of the body's own tissues for the attack. In the case of APS, the body creates antibodies that attack phospholipids, which are a type of fat that is found in all living cells.

Now, your blood cells are living cells, and so are the ones that make up the linings of your blood vessels. If your immune system is on the hunt for phospholipids, they are going to wreak havoc on your circulatory system. And any trauma to your circulatory system leads to the creation of blood clots.

But too much of a good thing is never a good thing.

An overabundance of blood clots can lead to, among other things, stroke, heart attack, deep vein thrombosis, and kidney failure. It can even lead to pregnant women who are suffering from the condition to experience premature births, miscarriages, eclampsia. In fact, one-fifth of women who suffer from recurring miscarriages have been found to have APS. 

Risk Factors

Although antiphospholipid syndrome affects both sexes, it is more common in females. And although the disorder occurs in patients of all ages, APS does more commonly affect females of child-bearing age. 

Furthermore, APS is more likely to occur in those already suffering from other autoimmune disorders such as lupus, rheumatoid arthritis, or psoriasis. In fact, APS affects 10% of those suffering from lupus.

Other factors that aren't related to other autoimmune conditions, but still pose an increased risk, include smoking, prolonged bed rest, pregnancy, cancer, kidney disease, the use of birth control pills, and being treated with hormone therapy.

Signs or Symptoms

The presence of antiphospholipid antibodies in an individual doesn't necessarily mean that they'll show any signs of antiphospholipid syndrome. However, there are some sure signs that an antiphospholipid syndrome test should be taken, all of which are related to the complications that blood clots can cause.

Major Signs

  • Shortness of breath
  • Stroke
  • Transient ischemic attacks (a sort of short-lived stroke)
  • Deep vein thrombosis
  • High blood pressure
  • Angina (chest pain caused by decreased blood flow to the heart muscle)
  • Heart attack
  • Swelling, redness, and sensitivity in the limbs
  • Persistent headaches
  • Changes in speech
  • Discomfort in the upper body (i.e., arms, back, neck, and jaw)
  • Nausea

Minor Signs

  • Heart valve issues
  • Loss of vision or other disturbances
  • Diminished balance or mobility
  • Difficulty concentrating

Lab Tests for APS

Antiphospholipid syndrome must be diagnosed accurately so that it can be treated effectively. This can also help rule out other potential causes of the above complications.

The substances most commonly tested for in the lab (via blood testing) when seeking a diagnosis of APS are:

Results should be consistent across at least two blood tests that are taken 12 or more weeks apart.

Other tests might be ordered for the evaluation of blood cells and clotting. These might include: 

Other additional tests for evaluating other potential causes of symptoms, like a 1:1 Mix study (dilute PTT) for screening the blood for lupus anticoagulant.

Because the presence of the above autoantibodies in the blood doesn't necessarily lead to symptoms, a positive diagnosis can only be made by considering clinical indicators. These include the occurrence of abnormal clotting in any blood vessels, which must be verified by imaging (e.g., CT scan, MRI, ECG) or tissue biopsy.

Frequently Asked Questions

Is there a cure for antiphospholipid syndrome?

Unfortunately, although research is ongoing, there is no cure for APS at present. However, medications are available that can help treat its symptoms and prevent further complications.

What kind of medication will I need to take to manage my APS?

Your doctor may prescribe you anticoagulant medications ("blood thinners") like heparin, warfarin, and/or aspirin. To ensure that these drugs don't decrease your blood's ability to clot so much that you develop potentially life-threatening conditions like internal bleeding, your doctor may want to perform other blood tests (like the PT test) regularly while you're on them.

If you're curious about having us at Ulta Lab Tests take care of your blood testing, here are some more quick answers about that.

Your Antiphospholipid Syndrome Tests

Getting blood work done for antiphospholipid syndrome tests can be costly, complicated, and time-consuming, but we at Ulta Lab Tests have endeavored to make the process as affordable and convenient as possible. All of our tests have been specially designed with accuracy and reliability in mind, allowing you to make the best-informed decision you can.

You can learn more about how it all works here.

You can easily take charge of your health by ordering your own APS antibody panel with us. Results will be provided to you online, securely, and confidentially within 24 to 48 hours. No insurance or referral is needed, and the doctor's order is included in the price.

And most importantly, Ulta Lab Tests offers a 100% satisfaction guarantee!