Later studies by Franz’s group [157] demonstrated no effect of diabetes on the maternal omentin level at 32 weeks of gestation, at the standard time for gestational diabetes testing (118 ± 77 ng/mL for GDM and 150 ± 89 ng/mL for non-GDM, respectively); however, the higher BMI of mothers was associated with a lower omentin concentration. This evidence concerns the gene ITLN1 and diabetes mellitus.