One aqua signal indicates one copy of the chromosome 18, one green signal indicates one copy of the X chromosome, and one orange signal indicates one copy of the Y chromosome.

Detects trisomy 18 (Edwards syndrome) and sex chromosome aneuploidies in prenatal diagnosis. Used to simultaneously determine copy number of chromosomes 18, X and Y in metaphase and interphase blood and tissue cells.

Essential for rapid prenatal genetic screening in high-risk pregnancies with 2-hour hybridization protocol. Identifies chromosomal aberrations for early intervention and counseling.