When split into NGT (29 women) and GDM (29 women), Gremlin-1 levels of women with NGT are not significantly higher than those of women with GDM, neither during pregnancy (meanNGT = 9.1 ± 5.8 ng/mL, meanGDM = 5.9 ± 3.1 ng/mL; p = 0.128) nor at the postpartum visit (meanNGT = 11.6 ± 15.9 ng/mL, meanGDM = 9.5 ± 9.0 ng/mL; p = 0.807). This evidence concerns the gene GREM1 and gestational diabetes.