Chromosomal disease is a common genetic disease, including abnormal chromosomes number and structure. Common chromosomal diseases include Klinefetelter syndrome, Turner syndrome, translocation and inversion. Chromosome molecular genetic testing (PGT-SR) refers to the analysis of chromosomal aneuploidy of the embryo before the embryo is implanted in the uterus, and the embryo with normal chromosomal condition is selected for transplantation. Based on the exclusive single-cell whole-genome amplification technology, Yikon Genomics combines high-throughput sequencing to detect the embryos of patients with chromosomal abnormalities and select euploid embryos for transfer, thereby improving the reproductive outcome of patients with chromosomal abnormalities.