Consort flow diagram for GDM screening and diagnosis among 5,391 women. High-risk women were screened early (mean 10.1 weeks gestation) and if screen negative in the first trimester, rescreened at 24–28 weeks gestation (n = 1,124). The majority of women were universally screened at 24–28 weeks gestation (n = 3,987). Overall, 10.7% women screened were diagnosed with GDM. GDM, gestational diabetes mellitus.