Maternal serum screening by OneDNA helps assess risk of chromosomal abnormalities and neural tube defects during pregnancy with accurate and reliable results.
Maternal Serum Screening (MSS), often called the "Dual Screen" or "First Trimester Combined Screening," is a non-invasive prenatal test performed on a sample of the mother's blood. It analyses specific proteins and hormones produced by the placenta and fetus that can indicate an increased chance for certain chromosomal conditions and neural tube defects. It is important to understand: MSS is a screening test, not a diagnostic test. It assesses probability, not certainty. A "screen positive" result indicates a higher chance, prompting discussion about confirmatory diagnostic tests like Chorionic Villus Sampling (CVS) or Amniocentesis.