PLOD1 and precocious puberty: In several studies of girls with precocious puberty (BMI unknown), the cut-off value of LH after triptorelin stimulation test were 7.65 mUI/L (Immunochemiluminescent analysis) (26), 6 IU/L(automated chemiluminescence assay) (2), and 7 IU/L for immunofluorometric assay or 8 IU/L for electrochemiluminescence immunoassay (3), respectively, to diagnose precocious puberty.