Table 1.

Screening and diagnosing GDM and pre-GDM.

Pregnant women without known prior diabetes	Screen at 24–28 weeks
Pregnant women with risk factors	Screen for undiagnosed T2D at first prenatal visit and at 24–28 weeks
Women with GDM history	Screen for diabetes or pre-diabetes every ⩾3 years
Women with GDM	Screen for persistent diabetes 6–12 weeks postpartum using OGTT and non-pregnancy diagnostic criteria

GDM: gestational diabetes mellitus; T2D: type 2 diabetes; OGTT: oral glucose tolerance test.