Arginine codon 274 (CGG) in exon 8 was changed to tryptophan (TGG) (c.820C>T, p.R274W) using an sgRNA (targeting GCAGACCCGGGTGATATCTGAGG) and an ssODN template with CRISPR/Cas9 technology. The mutation is the equivalent of the same human mutation associated with female infertility. (J:342780)