The Double Marker Test is an important prenatal screening test recommended during the first trimester of pregnancy to evaluate the risk of chromosomal abnormalities in the baby. It is usually performed between the 11th and 14th week of pregnancy and involves measuring two key substances in the mother’s blood — Free Beta hCG (human chorionic gonadotropin) and PAPP-A (pregnancy-associat... https://redcliffelabs.com/double-marker-test