IGHG3 and gestational diabetes: The median values for NBs from the GDM and control groups were IgG1 (4.67 and 5.18, p = 0.6146), IgG2 (0.55 and 0.60, p = 0.7730), IgG3 (0.63 and 0.62, p = 0.8078) and IgG4 (0.78 and 0.78, p = 0.8965), respectively.