HLA-G and spontaneous abortion: Secretion of sHLA-G in plasma from A-C-ins women also differed from those carrying G-C-ins when embryo transfer resulted in pregnancy (p = 0.016; median, 74.56 vs. 37.21 IU/ml; Figure 3A, Supplementary Table 2) and in a miscarriage (p = 0.013; median, 71.83 vs. 46.76; Figure 3C, Supplementary Table 4).