Preimplantation Genetic Screening (PGS)
Preimplantation Genetic Screening or PGS is a type of genetic screening performed to check the normalcy of the embryos before implantation during an IVF treatment. PGS technique allows to check the chromosome pairs for abnormalities to increase the success rates of an IVF cycle.
Why PGS is needed?
Chromosomal abnormalities are one of the major contributors towards the implantation failures. The embryos with abnormal chromosomes are more likely to result in a failed IVF cycle. Using PGS technique, chromosome pairs can be tested and normal embryo can be selected for transfer.
Eggs are fertilized in the laboratory to create an embryo. A few cells are removed from the embryos which reach the blastocyst stage. These cells are then checked for the abnormalities. The embryos which pass this screening test are selected for the the process.