If your obstetrician has mentioned a “double marker test,” a “triple marker test,” or NIPT and you’re not entirely sure which one you actually need — or whether you need more than one — you are far from alone. These three screening options are often introduced at different points in pregnancy, sometimes by different doctors, … Continue reading Down Syndrome Screening in Pregnancy: How to Choose Between the First-Trimester Combined Test, Quad Screen, and Non-Invasive Prenatal Testing (NIPT)