Clarilab

Pregnancy

Double marker test test

Also called dual marker, PAPP-A, first trimester screen

Two blood markers (PAPP-A and free beta hCG) combined with the NT scan.

Why it's done

Screens for Down syndrome and other chromosomal conditions at 11–14 weeks.

What a high result can mean

Results come as a risk (for example 1 in 1,000). A high-risk result is a reason for more testing, not a diagnosis.

Got a report with Double marker test?

Upload the PDF to Clarilab: it reads the values in your browser, flags anything out of range and tracks your results over time.

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Included in these checkups

Pregnancy: 11–14 weeks

More pregnancy tests

Glucose tolerance test (OGTT)Blood sugar before and after drinking a measured glucose drink (usually 75 g). Beta hCGThe pregnancy hormone made by the placenta. Blood group and RhYour ABO group and whether you are Rh positive or negative. Indirect Coombs test (ICT)Looks for antibodies in your blood that could attack the baby's red cells. Rubella IgGAntibodies showing you are immune to rubella (German measles). Rubella IgMAntibodies that show a recent rubella infection.