Combined Test (Nuchal Translucency)
The Combined Tests consists of a transabdominal ultrasound pregnancy scan (full bladder) to measure the amount of fluid under the skin at the back of the fetal neck (nuchal translucency scan) and a maternal blood sample for two blood markers (BhCG and PAPP-A). Sometimes it is called the First Trimester Serum Screening or FTSS. Together with maternal age, a probability is calculated for conditions such as Down Syndrome, Edward Syndrome and Patau Syndrome. If the probability is more than 1:150 then further testing like CVS, Amniocentesis or NIPT (Panorama) is offered.