HLA-G and gestational diabetes: Cross-correlating the maternal plasma levels with the fetal HLA-G genotype, we noticed a peak in GDM women with an HLA-G del/ins fetus, while in controls, the peak was in pregnant women with an HLA-G del/del fetus (significant interaction between HET and diagnosis; p = 0.026β35.6, 95% CI = 4–66), particularly evident in the second trimester (p = 0.02) (Figure 2(c)).