Goals of treatment are Fasting blood glucose levels at < 95 mg / dL (< 5.3 mmol / L) 2-hour postprandial levels at ≤ 120 mg / dL (≤ 6.6 mmol / L) No wide blood glucose fluctuations Glycosylated hemoglobin (HbA1c) levels at < 6.5% Table Table Table Insulin is the traditional drug of choice because it cannot cross the placenta and provides more predictable glucose control; it is used for types 1 and 2 diabetes and for some women with gestational diabetes.