It has been found that the level of chemerin in the group of obese patients without GDM (195.0 ± 34.4 ng/mL) or overweight without GDM (151.0 ± 15.5 ng/mL) was significantly higher compared to healthy pregnant women of normal weight (73.1 ± 8.6 ng/mL) [88]. The gene discussed is RARRES2; the disease is gestational diabetes.