The PTX3 level in the ovary was pronouncedly associated with the existence of PCOS (95% CI = 3.704~8.711), serum LH to FSH ratio on the third day of menstrual cycles (95% CI = 1.704~4.898), and ovarian androstenedione (95% CI = 0.600~0.846). This evidence concerns the gene PLOD1 and polycystic ovary syndrome.