IL37 and preeclampsia: The concentrations of IL-23 in sera of patients with pregnancies complicated by FGR and preeclampsia were significantly higher when compared to healthy pregnant normotensive women (IL-23: median, 1.93 pg/ml; interquartile ranges, 1.37–2.68 pg/ml, versus median, 1.95 pg/ml; interquartile ranges, 1.11–2.84 pg/ml; NS).