<prompt> At what value for one hour glucose challenge test will you recommend a standard glucose tolerance test:120 mgd1140 mgdl150 mgd1160 mgdl  <response>: Answer is B 140 mgdl: A serum blood glucose value greater than 140 mgdl at one hour in an one hour glucose challenge test is termed suspicious and requires a formalstandard glucose tolerance test. One hour glucose challenge test 0 Sullivan test The one hour glucose challenge test 0 Sullivan test is done to detect gestational diabetes and screen non symptomatic pregnant women. This test is the recommended screening test by the American College of Obstetricians and Gynaecologists ACOG The test One step approach An oral glucose load of 50g is administered and blood is examined for glucose levels one hour after administration. Reference values A plasma glucose level of -140 mgdl 1 hour after challenge is considered suspicious. Implication Patients with a positive 1 hour glucose challenge test should undergo the standard 3 hour, 100 gm oral GTT for pregnant women. Note: The standard oral GTT for pregnant women is a 3 hour test. The standard oral GTT for individuals other than pregnant women is a 2 hour test. 