PND FISH TestFISH(Fluorescent In-Situ Hybridization)Confirming diagnosis through a targeted approach FISH test looks at certain parts of the chromosomes and can even detect very small parts of chromosomes that are either missing or extra. A FISH test is usually conducted on a blood sample taken from a vein. For testing during pregnancy, it may also be done on a sample of amniotic fluid or CVS.Target gene: NTRK3Format: CE-IVD/RUO