In a study by Šimkova et al., higher levels of BPA, luteinizing hormone (LH), luteinizing hormone/follicle–stimulating hormone ratio (LH/FSH ratio), T, free T, bioavailable T, A and 7β-OH-epiandrosterone were found in normal-weight PCOS women. The gene discussed is PLOD1; the disease is polycystic ovary syndrome.