How is gestational diabetes diagnosed?

Glucose tolerance: Gestational diabetes is diagnosed with a glucose tolerance test, more precisely, 1 hour glucose tolerance test. That implies taking a 75 gram glucose load (usually a sweetened drink is served) and measurement of glucose 1 hour after that. The test doesn't need to be done on empty stomach. If abnormal, it is followed by the 3 hour glucose tolerance test that is done on empty stomach.

Dr Villaplana and another doctor agreed

Lab tests: Check blood glucose and Insulin and do glucose tolerance test.