Gestational diabetes & diabetes in pregnancy

Continuous Glucose Monitoring Metrics in Women with Type 2 Diabetes in Pregnancy: The TIMELY Observational Cohort Study

Diabetes Technol TherPublished Prospective observational cohort study

Authors' conclusion

Several glycemic metrics, including TIRp and mean glucose, were associated with LGA. Higher glucose levels from 12 weeks onward were seen in mothers of LGA infants.

Study context

Population
Pregnant women with T2D enrolled before 26 weeks of gestation, 3 diabetes in pregnancy clinics; mean enrolment 16 weeks, 83% non-European ethnicity
Participants
50 women
Outcome
CGM metrics across pregnancy
Follow-up
Across pregnancy
Methodological detailsmulticentre
  • Multicentre

Main finding

As reported in the abstract

Mean TIRp (3.5-7.8 mmol/L)

73.0%

Mean TARp

25.6%

Mean time below range

1.5%

Mean glucose, mean (SD)

6.8 (1.0) mmol/L

Observational data: associations, not effects.

Further findings

LGA by TIRp category

P = 0.02

OutcomeOR (CI)P value
LGA per 5% improvement in TIRpReduced LGA by 28%0.72 (0.54–0.90)P = 0.009

Other associations

Wore continuous glucose monitoring (CGM) >80% of the time from enrolment
74%
Mean glucose significantly higher in those with an large-for-gestational-age (LGA) infant from 12 weeks onward
TARp >30% significantly associated with composite neonatal outcome
>20% TARp overnight significantly associated with LGA
Diabetes distress at enrolment associated with significantly lower TIRp and higher mean glucose throughout pregnancy

Original publication

Continuous Glucose Monitoring Metrics in Women with Type 2 Diabetes in Pregnancy: The TIMELY Observational Cohort Study. Diabetes Technol Ther. Published 21 July 2026. doi:10.1177/15209156261470491

Composed by AI from the published abstract and checked against it. How Briefs are made →

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