The Double Marker Test is a crucial prenatal screening test performed during the first trimester of pregnancy to assess the risk of chromosomal abnormalities such as Down syndrome (Trisomy 21) and Edwards syndrome (Trisomy 18) in the unborn baby. It analyzes two key markers in the mother's blood—free beta-hCG and PAPP-A—and combines this data with ultrasound findings and maternal age ... https://redcliffelabs.com/double-marker-test