LEP and gestational diabetes: The increased risk of pre‐eclampsia and GDM with higher leptin levels are consistent with several other studies.5, 6, 7, 8, 9, 10, 11, 12, 13 In previous studies, leptin levels during pregnancy were observed to be higher among women with pre‐eclampsia compared with controls,8, 9, 10 though no previous studies assessed levels prior to pregnancy and subsequent pre‐eclampsia.