{"id":"lh","name":"Luteinizing Hormone (LH)","shortName":"LH","aliases":["Luteinizing Hormone","LH","Lutropin","LH, Serum","LH, Ultrasensitive","LH, Pediatric","Luteinising hormone","Hormona luteinizante","Luteinizing Hormone (LH), Serum","Luteinizing Hormone, Serum","Luteinizing Hormone (LH)","Interstitial Cell-Stimulating Hormone","LH Level"],"abbreviations":["LH","ICSH"],"loinc":[{"code":"10501-5","primary":true},{"code":"83103-2","primary":false}],"specimen":"serum","units":[{"ucum":"m[IU]/mL","display":"mIU/mL"},{"ucum":"[IU]/L","display":"IU/L"}],"referenceRanges":[{"population":"Men, 18+","low":1.7,"high":8.6,"unit":"m[IU]/mL","unitDisplay":"mIU/mL","note":"Roche ECLIA interval from Labcorp and ARUP, which print the same numbers. IU/L and mIU/mL are the same number. Mayo, also on a Roche assay, lists 1.3–9.6 IU/L for ages over 18.","sources":[{"title":"Luteinizing Hormone (LH) (test 004283)","url":"https://www.labcorp.com/tests/004283/luteinizing-hormone-lh","publisher":"Labcorp"},{"title":"Luteinizing Hormone and Follicle Stimulating Hormone (test 0070193)","url":"https://ltd.aruplab.com/Tests/Pub/0070193","publisher":"ARUP Laboratories"},{"title":"LH - Luteinizing Hormone (LH), Serum","url":"https://www.mayocliniclabs.com/test-catalog/overview/602752/luteinizing-hormone-lh-serum","publisher":"Mayo Clinic Laboratories"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"A pituitary hormone that triggers ovulation in women and tells the testes to make testosterone in men. It surges mid-cycle.","url":"https://bloodtesttracker.com/markers/lh","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}