pGCD59 (<14 WG) - adjusted ROC curves for maternal age, BMI, maternal ethnicity, parity, previous GDM, family history of diabetes and week of gestation at pGCD59 sampling at Galway University Hospital, Galway, Ireland between November 2018 and March 2020, n = 378. A: pGCD59 prediction of GDM status AUC:0.64 95 %CI: 0.56–0.70; B: pGCD59 prediction of fasting glucose of 5.1 mmol/L, AUC:0.71 95 %CI: 0.62–0.79; C: pGCD59 prediction of fasting glucose of 5.3 mmol/L, AUC:0.73 95 %CI: 0.62–0,83; D: pGCD59 prediction of 1-h glucose of 10 mmol/L 95 %CI: 0.53–0.70; E: pGCD59 prediction of 2-h glucose of 8.5 mmol/L, AUC:0.67 95 %CI: 0.56–0.76.