However, Karakulak et al. [36] found that the umbilical cord blood ghrelin levels were decreased in the offspring of the gestational diabetes mellitus (GDM) women even after adjustment for birth weight, whereas Kara et al. [20] were able to notice similar ghrelin and leptin concentrations in the serum of the control and GDM mothers’ newborns. The gene discussed is GHRL; the disease is gestational diabetes.