Pre-Implantation Genetic Screening (PGS)

Pre-Implantation Genetic Screening (PGS) is an IVF procedure designed to examine embryos for aneuploidy (embryos having the wrong number of chromosomes) and unbalanced translocations (chromosomes incorrectly arranged). An embryo biopsy is performed on day 5 or 6, and all 23 pairs of chromosomes are examined. PGS aims at improving pregnancy and live birth rates with fewer embryos being transferred.