A Look Back at the Birth of PGD Screeningbr Fertility Planit - Alexandria Centerbr Conference Room 1br Anver Kulievbr PhD, Director of Research, Reproductive Genetics Institute br Preimplantation aneuploidy testing has become an established tool for preselection of oocytes and embryos with the highest developmental potential. The technique has evolved into 24 chromosome aneuploidy testing, using microarray analysis and most recently also next generation sequencing technology (NGS).