Therefore, we analysed the expression of PCOS candidate genes identified by GWAS and additional genes, including androgen receptor (AR), transforming growth factor beta 1 induced transcript 1 (TGFB1I1; also known as Hic5), FBN3 and AMH, in bovine fetal ovaries throughout gestation as well as in adult ovaries. Here, AMH is linked to polycystic ovary syndrome.