Evidence-Based Supplement & Herb Guides

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...

PTT-LA Test: Lupus Anticoagulant Screening, Prolonged Clotting Time, and Meaning

Understand what the PTT-LA test screens for, why a prolonged result is not diagnostic, how mixing and confirmation work, and what the result may mean for lupus anticoagulant and APS.

The PTT-LA test is an activated partial thromboplastin time designed to be sensitive to lupus anticoagulant. It measures how long plasma takes to clot...

Recurrent Pregnancy Loss Antiphospholipid Panel: APS Markers, Miscarriage Risk, and Meaning

Learn which APS markers are included in recurrent pregnancy loss testing, how positive and negative patterns are interpreted, why 12-week confirmation matters, and how results may guide a future pregnancy.

A recurrent pregnancy loss antiphospholipid panel checks for antibodies associated with obstetric antiphospholipid syndrome (APS), an acquired autoimmune condition that can contribute to miscarriage,...

Seronegative Antiphospholipid Syndrome Test Panel: Non-Criteria Antibodies and APS-Like Symptoms

Learn what a seronegative APS test panel may include, why non-criteria antibodies require cautious interpretation, and how specialists evaluate APS-like symptoms when standard markers are negative.

Seronegative antiphospholipid syndrome is a proposed diagnosis for people with thrombosis, pregnancy morbidity, or other strongly APS-like features who repeatedly test negative for the...

Thrombosis Antiphospholipid Panel: Clotting Risk, APS Markers, and Meaning

Learn what a thrombosis antiphospholipid panel measures, when APS testing is useful after a clot, how anticoagulants affect results, and what single, double, or triple positivity may mean.

A thrombosis antiphospholipid panel looks for the persistent autoimmune markers that support antiphospholipid syndrome (APS) in a person with a confirmed blood clot. The...

Triple-Positive Antiphospholipid Antibody Panel: High-Risk APS, Clotting Risk, and Meaning

A triple-positive antiphospholipid antibody panel means that all three standard APS laboratory categories are positive: lupus anticoagulant, anticardiolipin antibodies, and anti-beta-2 glycoprotein I antibodies....