Further, in the comparison of GDM pharmacological treatment types, it was demonstrated that metformin was a safe alternative to insulin based on evidence of delivery outcomes and neonatal complications (Barrett et al., 2013; Ijäs et al., 2011; Niromanesh et al., 2012; Rowan et al., 2008; Tertti et al., 2013) but in terms of neonatal anthropometry, the evidence to date is largely based on birth weight (Niromanesh et al., 2012; Rowan et al., 2008; Tertti et al., 2008). Here, INS is linked to gestational diabetes.