Amniotic Fluid Karyotype test is a laboratory test analysis that allows your doctor to examine your set of chromosomes. Examining chromosomes through this test allows your doctor to determine whether there are any abnormalities or structural problems within the chromosomes.When a cell divides, it needs to pass on a complete set of genetic instructions to each new cell it forms.This test examines these dividing cells.The arrangement of pairs of chromosomes are one the basis of size and appearance. This helps your doctor easily determine if any chromosomes are missing or damaged.