Gestational diabetes & diabetes in pregnancy

Glycaemic control and pregnancy outcomes with real-time continuous glucose monitoring in gestational diabetes (GRACE): an open-label, multicentre, multinational, randomised controlled trial

Lancet Diabetes EndocrinolPublished Randomised controlled trial

Primary result · LGA newbornsResult — go to the resultOdds ratio 0.32 95% CI 0.10–0.87

Authors' conclusion

rt-CGM use in women with gestational diabetes reduced LGA births, without differences in serious adverse events. The higher-than-expected overall prevalence of SGA infants, possibly related to the tight glycaemic control in our cohort, requires further research.

Study context

Population
Women aged 18–55 years with singleton pregnancy and GDM (IADPSG criteria), 4 university hospitals in Austria, Germany and Switzerland; randomised at mean 28.6 weeks of gestationrandomised 1:1
Participants
375 women
Comparison
rtCGM vs self-monitoring of blood glucose (SMBG)
  • Real-time continuous glucose monitoring (rt-CGM)n = 190
  • SMBGn = 185reference
Primary endpoint
Proportion of large-for-gestational-age (LGA) newborns (GROW customised birthweight percentiles)
Methodological detailsopen-label, parallel-group, multicentre, multinational, minimisation
  • Open-label
  • Parallel-group
  • Multicentre
  • Multinational
  • Minimisation

Primary result

LGA newborns

Odds ratio

0.32

95% CI 0.10–0.87

P = 0.014

Events by treatment group

rt-CGMvs SMBG
OR 0.32 (95% CI 0.10–0.87); P = 0.014

As reported in the abstract

Secondary outcomes

Outcomert-CGMSMBGOR (CI)P value
SGA neonates19%13%1.59 (0.86–2.99)P = 0.11

Safety

No differences in serious adverse events between rt-CGM and SMBG
P = 0.39

Original publication

Glycaemic control and pregnancy outcomes with real-time continuous glucose monitoring in gestational diabetes (GRACE): an open-label, multicentre, multinational, randomised controlled trial. Lancet Diabetes Endocrinol. Published 24 November 2025. doi:10.1016/s2213-8587(25)00288-8

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