Recently, a genome-wide association study (GWAS) found an association between recurrent infertility, such as repeat breeders, and an X-linked maternal single-nucleotide variant located 2175 base pairs upstream of the start codon of the bovine FOXP3 gene (NC_037357.1: g.87298881A>G, rs135720414) in Japanese Black (JB; Bos taurus) cows with lower FOXP3 transcript levels [11]. The gene discussed is FOXP3; the disease is Infertility.