Clarilab

Pregnancy

Quadruple marker test test

Also called quad screen, triple marker

Four blood markers (AFP, hCG, estriol, inhibin A).

Why it's done

Screens for chromosomal conditions and spine defects at 15–20 weeks if the first-trimester screen was missed.

What a high result can mean

Reported as a risk; a high-risk result leads to more testing.

Got a report with Quadruple 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.

Try Clarilab free How it works

Included in these checkups

Pregnancy: second trimester

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.