Evidence-Based Supplement & Herb Guides

Anticardiolipin IgA Antibody Test: Antiphospholipid Antibodies and APS Risk

Learn how the anticardiolipin IgA antibody test is interpreted, why IgA is not an APS criteria marker, and what a positive result may mean for clotting and pregnancy risk.

The anticardiolipin IgA antibody test measures IgA-class antibodies that react with cardiolipin-associated antigen complexes. It is sometimes added when a person has thrombosis, pregnancy...

Anticardiolipin IgG Antibody Test: Clotting Risk, Pregnancy Loss, and APS Meaning

Learn how anticardiolipin IgG levels are interpreted, why persistent moderate or high results matter, and how the test relates to APS, clotting, and pregnancy loss.

The anticardiolipin IgG antibody test measures IgG autoantibodies that bind cardiolipin-associated targets in the blood. It is one of the main laboratory tests used...

Anticardiolipin IgM Antibody Test: Clotting Risk, Pregnancy Loss, and APS Meaning

Learn how anticardiolipin IgM results are interpreted, why low values may be temporary, and when persistent IgM may matter for APS, clotting, and pregnancy loss.

The anticardiolipin IgM antibody test detects IgM-class antibodies that react with cardiolipin-associated targets. It is one of the accepted laboratory tests used in antiphospholipid...

Anti-Phosphatidylethanolamine Antibody Test: Antiphospholipid Marker and Pregnancy Loss Risk

Learn what an anti-phosphatidylethanolamine antibody test measures, how a positive aPE result relates to pregnancy loss, and why it does not diagnose APS alone.

The anti-phosphatidylethanolamine antibody test looks for immune proteins that react with phosphatidylethanolamine, a phospholipid found in cell membranes and platelet-related structures. These antibodies, often...

Anti-Phosphatidylserine Antibody Test: APS Marker, Positive Result, and Meaning

Understand what an anti-phosphatidylserine antibody test measures, how positive and borderline results are interpreted, and why the marker does not diagnose APS alone.

An anti-phosphatidylserine antibody test detects autoantibodies that react with phosphatidylserine, a membrane phospholipid that becomes exposed when cells are activated, injured, or undergoing programmed...

Antiphospholipid Antibody Repeat Testing: 12-Week Confirmation and APS Diagnosis

Learn why antiphospholipid antibodies are repeated after at least 12 weeks, which tests need confirmation, and how anticoagulants affect APS diagnosis.

Antiphospholipid antibody repeat testing is used to determine whether an abnormal result is persistent rather than temporary. For antiphospholipid syndrome assessment, a criteria antibody...

Antiphospholipid IgA Antibody Panel: Antiphospholipid Antibodies, APS Risk, and Meaning

Learn what an antiphospholipid IgA antibody panel measures, how positive results differ from standard APS markers, and what they may mean for clotting and pregnancy risk.

An antiphospholipid IgA antibody panel looks for immunoglobulin A antibodies directed against phospholipid-related targets, most often cardiolipin and beta-2 glycoprotein I. These tests can...

Antiphospholipid IgG Antibody Panel: Clotting Risk, APS Diagnosis, and Meaning

Understand what an antiphospholipid IgG antibody panel includes, how levels and persistent results affect APS diagnosis, and what a positive test may mean for clotting risk.

An antiphospholipid IgG antibody panel checks for IgG autoantibodies that recognize phospholipid-binding proteins or related targets. The most important components are anticardiolipin IgG and...

Antiphospholipid IgM Antibody Panel: Clotting Risk, APS Diagnosis, and Meaning

Learn how an antiphospholipid IgM antibody panel is interpreted, when isolated or persistent IgM may matter, and how results relate to clotting risk and APS diagnosis.

An antiphospholipid IgM antibody panel measures IgM antibodies against phospholipid-related targets, usually anticardiolipin and beta-2 glycoprotein I. These results can help evaluate antiphospholipid syndrome...

Antiphospholipid Syndrome Blood Test Panel: Lupus Anticoagulant, Anticardiolipin, Beta-2 Glycoprotein, and APS Diagnosis

Learn what an APS blood test panel includes, how lupus anticoagulant, anticardiolipin, and beta-2 glycoprotein results are combined, and how testing supports diagnosis.

An antiphospholipid syndrome blood test panel combines three established marker groups: lupus anticoagulant, anticardiolipin antibodies, and anti-beta-2 glycoprotein I antibodies. Together, these tests help...

Anti-Prothrombin Antibody Test: Antiphospholipid Syndrome, Clotting Risk, and Meaning

Learn what an anti-prothrombin antibody test measures, how it differs from aPS/PT testing, and what a positive result may mean for APS and clotting risk.

The anti-prothrombin antibody test looks for autoantibodies that recognize prothrombin, also called coagulation factor II. Prothrombin is a normal blood protein that the body...

APS Monitoring Blood Test Panel: Antibodies, Clotting Risk, Pregnancy Risk, and Follow-Up

Learn which blood tests and clinical checks are used to monitor APS, including antibodies, INR, heparin safety, clotting risk, pregnancy surveillance, and follow-up timing.

APS monitoring is not one fixed blood panel repeated at every visit. Follow-up for antiphospholipid syndrome usually combines medication-specific tests, blood counts, kidney and...

Beta-2 Glycoprotein 1 IgA Antibody Test: APS Risk and Antiphospholipid Antibodies

Learn what a beta-2 glycoprotein 1 IgA antibody result means, why it is a non-criteria APS marker, and how isolated or persistent positivity may relate to clot risk.

The beta-2 glycoprotein 1 IgA antibody test detects IgA autoantibodies against beta-2 glycoprotein I, a blood protein involved in many clinically important antiphospholipid antibody...

Beta-2 Glycoprotein 1 IgG Antibody Test: APS, Clotting Risk, and Pregnancy Loss

Learn how beta-2 glycoprotein 1 IgG testing supports APS diagnosis, how levels and persistent results affect clot risk, and what the test may mean after pregnancy loss.

The beta-2 glycoprotein 1 IgG antibody test measures IgG autoantibodies against beta-2 glycoprotein I, a major target in antiphospholipid syndrome (APS). It is one...

Beta-2 Glycoprotein 1 IgM Antibody Test: APS, Clotting Risk, and Pregnancy Loss

Understand what a beta-2 glycoprotein 1 IgM antibody result means, how it relates to APS, clotting and pregnancy loss, and why repeat testing matters.

The beta-2 glycoprotein 1 IgM antibody test looks for an autoimmune antibody linked to antiphospholipid syndrome, or APS. APS can raise the risk of...

Dilute Russell Viper Venom Time (dRVVT) Test: Lupus Anticoagulant Screening and Confirmation

Learn how the dRVVT test screens for lupus anticoagulant, how screen-mix-confirm results are interpreted, and why anticoagulants can distort the result.

The dilute Russell viper venom time, usually shortened to dRVVT, is one of the main laboratory methods used to detect lupus anticoagulant. Despite its...

Hexagonal Phospholipid Neutralization Test: Lupus Anticoagulant Confirmation and Meaning

Learn how the hexagonal phospholipid neutralization test confirms lupus anticoagulant, what the delta clotting time means, and which drugs can interfere.

The hexagonal phospholipid neutralization test is an aPTT-based method used to confirm that a prolonged clotting time is caused by a phospholipid-dependent inhibitor, most...

Lupus Anticoagulant Reflex Panel: Screening, Mixing Study, Confirmation, and Interpretation

Understand how a lupus anticoagulant reflex panel uses screening, mixing, and confirmation tests, how to read the report, and why medication can interfere.

A lupus anticoagulant reflex panel is a stepwise group of clotting tests designed to determine whether a phospholipid-dependent inhibitor is present. The laboratory starts...

Lupus Anticoagulant Test: Positive, Negative, Clotting Risk, and APS Meaning

Learn what positive, negative, and indeterminate lupus anticoagulant tests mean, how they relate to clotting risk and APS, and why repeat testing matters.

A lupus anticoagulant test looks for an antibody effect that slows phospholipid-dependent clotting reactions in the laboratory. The name is confusing: the antibody can...

Phosphatidylserine-Prothrombin Antibody Test: APS Risk, Clotting Risk, and Meaning

Learn what a phosphatidylserine-prothrombin antibody test measures, how IgG and IgM results relate to APS and clotting risk, and why context and repeat testing matter.

The phosphatidylserine-prothrombin antibody test looks for immune proteins that bind to a complex formed by phosphatidylserine and prothrombin. These antibodies, usually reported as aPS/PT...