The Double Marker Test is an important prenatal screening done during the first trimester of pregnancy (between 11 to 14 weeks) to assess the risk of chromosomal abnormalities in the fetus. It analyzes two key substances in the mother’s blood—free Beta-hCG (human chorionic gonadotropin) and PAPP-A (Pregnancy-Associated Plasma Protein-A). Abnormal levels may suggest a higher chance of ... https://redcliffelabs.com/double-marker-test