What is the Double Marker Test?

The Double Marker Test is a prenatal blood screening done in the first trimester to assess the risk of chromosomal abnormalities such as:

• Trisomy 21 (Down Syndrome)

• Trisomy 18 (Edwards Syndrome)

• Trisomy 13 (Patau Syndrome)

It evaluates two key markers in the mother’s blood:

• Free Beta hCG

• PAPP-A (Pregnancy Associated Plasma Protein A)

DELFIA stands for Dissociation-Enhanced Lanthanide Fluorescent Immunoassay, a highly sensitive and precise technology used to measure hormonal levels.

The DELFIA Graph is a visual risk assessment graph provided in the test report, where:

• A colored risk curve is shown

• Your result (risk level) is plotted as a dot or line

• The graph helps quickly identify if the patient falls in a:

  • ✅ Low-Risk Zone

  • ⚠️ Borderline Zone

  • ❌ High-Risk Zone