Comprehensive Chromosomal Screening (CCS), also known as Embryo Screening, is performed to check for any chromosomal abnormalities in all 24 chromosomes caused by missing or additional chromosomes. Chromosomal abnormalities include Trisomy 13 (Patau's syndrome), Trisomy 18 (Edward’s syndrome) and Trisomy 21 (Down syndrome). CCS also includes the screening of chromosomes X and Y, making Family Balancing through Gender Selection possible.
The accuracy for CCS when screening for X and Y (gender) chromosomes is 99.9%