There are a few ongoing large randomized controlled trials (RCT's) on continuous glucose monitoring (CGM) in women with gestational diabetes (GDM) powered for pregnancy outcomes. However, none of these studies included women diagnosed with early GDM. The CORDELIA trial is a Belgian open-label multi-centric RCT with 14 centers in women with GDM (including both early and late GDM). Women will be randomized 1/1 to either treatment with CGM (intervention group, Freestyle Libre 3) or continue with self-monitoring of blood glucose (SMBG) with glucometer in line with normal routine (control arm). The study ends at the postpartum oral glucose tolerance test (OGTT 6-24 weeks postpartum) to screen for glucose intolerance.