Next, the serum levels of AMH and the LH/FSH ratio were compared between the three subgroups of the PCOS subjects (Table 4): T subgroup (HA with T elevated), non-T subgroup (HA with other androgens elevated but T, such as A2, DHT, DHEA or DHEAS), non-HA subgroup (no androgen elevated). This evidence concerns the gene PLOD1 and polycystic ovary syndrome.