Fasting glucose in the first trimester: An initial approach to diagnosis of gestational diabetes.

Objectives: To establish whether fasting glucose levels in the first trimester (FGFT)of pregnancy ≥ 92 mg/dL (5.1 mmol/L) (FGFT) anticipate the occurrence of maternal-fetal complications of gestational diabetes mellitus. To assess whether FGFT can replace diagnosis of GDM using the classical two-step oral glucose tolerance test (OGTT).