Our Center; was included in the ile 2016 PGD Blastomere / Trophectoderm array / NGS for aneuploidy pilot ası study performed by the olm Cytogenetic External Quality Assessment Service (CEQAS) “for 24 chromosomal scans (PGS) by the next generation sequencing (NGS) method in embryos. After the study, NGS PGS studies were conducted on 3 different samples sent by CEQAS and sent back as report. According to the results of our study, our center received full scores in terms of the accuracy of the analyzes.