Compared to the patients analysed, the patients who did not undergo a postpartum OGTT were significantly younger in G1 (31.99 ± 5.45 versus 33.51 ± 5.03 years old, p < 0.05), had more personal history of macrosomia in G1 (22.4% versus 15.1% p < 0.05) and in G2 (18.5% versus 8.6%, p < 0.05), less insulin therapy in G1 (41.4% versus 52.2%. Here, INS is linked to Large for gestational age.