INS and Hypoglycemia: Risks of NICU admission and neonatal hypoglycemia were lower in the metformin group and reached a statistically significant level when compared with insulin (RR, 0.75; 95% CI, 0.64 to 0.87; P < 0.001; RR, 0.57; 95% CI, 0.49 to 0.66; P < 0.001; respectively).