Compatible cut-off values for luteinizing hormone and the luteinizing hormone/follicle-stimulating hormone ratio in diagnostic criteria of the Japan Society of Obstetrics and Gynecology for polycystic ovary syndrome.

We obtained cut-off values of LH and the LH/FSH ratio for diagnostic criteria of JSOG criteria for PCOS, that were highly compatible between two major assay systems. These cut-off values will contribute to the diagnosis of PCOS in Japan and presumably in women of Asian ethnicities.