The Double Marker Test is an important prenatal screening done during the first trimester (11th to 14th week of pregnancy) to evaluate the risk of chromosomal abnormalities in the developing baby. It measures two key markers in the mother’s blood—free Beta-hCG and PAPP-A (Pregnancy-Associated Plasma Protein-A). Abnormal levels may indicate an increased risk of conditions such as Down ... https://redcliffelabs.com/double-marker-test