Interestingly, in the present study, despite the absence of gestational diabetes among patients delivering macrosomic neonates, as reflected by the OGTT results performed between 24–28 gestational weeks, placental expression of GLUT-1 and GLUT-12 remained in positive correlation with the 1 h and 2 h plasma glucose concentrations. Here, SLC2A1 is linked to gestational diabetes.