What do systematic reviews say?

Metformin vs glibenclamide ‐ neonatal outcomes

Metformin showed no clear difference in neonatal hypoglycaemia compared with glibenclamide ‐ neonatal outcomes (low certainty).

• Oral anti‐diabetic pharmacological therapies for the treatment of women with gestational diabetes 2017 · Cochrane Headline outcomes only
  RR 0.86 [0.42, 1.77]
  4 studies · 554 participants
  Low