Outcomes of pregnancies affected by impaired glucose tolerance.

OBJECTIVE: Gestational diabetes mellitus (GDM) is associated with an increase in both maternal and neonatal morbidity. There remains uncertainty, however, about the diagnostic criteria for GDM. We compared pregnancy outcomes across three groups of women, with the aim of establishing a threshold for diagnosis of GDM at our institution. METHODS: Women with a glucose tolerance test (GTT) were identified on the hospital's pathology database. Those women with a singleton pregnancy, in whom a GTT had demonstrated a fasting value /=7.8mmol/L and who confined /=5.5mmol/L and/or 2h >/=7.8mmol/L on 75g GTT.