Test Name
50G GLUCOSE LOADING TEST (O'SULLIVAN)
Aliases
GLUCOSE CHALLENGE TEST, ONE-HOUR GESTATIONAL DIABETES SCREENING TEST
Abbreviations
GCT
Test Classification
PANEL (PACKAGES)
Department
ROUTINE CHEMISTRY
Sub Department
-
TAT Category
BUSINESS (WORKING) TIME
Estimated TAT
3
TAT Units
HOURS
Test Requirements
NO fasting required; for pregnant women only; collect baseline (random) glucose sample; load with 55g glucose monohydrate (=50g anhydrous glucose); collect another sample 1hour post load
Clinical Utility
Screening of gestational diabetes mellitus (GDM)
Last Review
26th Feb 2026