Serum gonadotropin inhibiting hormone (GnIH), Kisspeptin‐10 (Kp‐10), LH, oestradiol 17β (E2) and cortisol concentrations (mean ± SD) in cows with follicular cysts (Group FC) and in healthy cows on heat (Group H). This evidence concerns the gene PLOD1 and Follicular Cyst.