{"id":"glucose-challenge-1h","name":"Glucose (1-Hour, 50 g Challenge Screen)","shortName":"Glucose Challenge (1 h)","aliases":["Glucose Challenge Test","GCT","1 Hour Glucose Challenge","Glucose, 1 Hour Post 50 g","50g Glucose Screen","Glucola 1 Hr","Gestational Diabetes Screen, 1 Hour","Glucose, 1 Hr (50 g)","50 g Glucose Load Test","One-Hour Glucose Challenge Test","Glucose Screen, Gestational"],"abbreviations":["GCT","GLT"],"loinc":[{"code":"1504-0","primary":true},{"code":"14754-6","primary":false},{"code":"20438-8","primary":false}],"specimen":"serum-or-plasma","units":[{"ucum":"mg/dL","display":"mg/dL"},{"ucum":"mmol/L","display":"mmol/L"}],"referenceRanges":[],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"A first-step sugar test in pregnancy. Your blood sugar one hour after a 50 g sugar drink shows whether a longer test is needed.","url":"https://bloodtesttracker.com/markers/glucose-challenge-1h","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}