Gestational diabetes & diabetes in pregnancy

Gestational diabetes mellitus phenotypes defined by 75-g oral glucose tolerance test response patterns: associations with perinatal outcomes and persistent postpartum diabetes

Diabetes Res Clin PractPublished Ambispective cohort study

Authors' conclusion

OGTT pattern-based phenotyping differentiates GDM subgroups in routine care, with differences in metabolic severity, treatment need, selected perinatal indicators, and postpartum diabetes risk, supporting targeted antenatal management and postpartum follow-up.

Study context

Population
Women with gestational diabetes mellitus (GDM) diagnosed by 75-g oral glucose tolerance test (OGTT) at 24–28 weeks' gestation (IADPSG), January 2020–May 2025; mean age 31.4 years, mean BMI 32.5 kg/m²
Participants
251 women
Exposure
GDM phenotypes by 75-g OGTT response pattern
Outcome
Persistent postpartum diabetes
Follow-up
≥ 12 weeks postpartum
Methodological detailssingle-center
  • Single-center

Main finding

As reported in the abstract

Persistent postpartum diabetes, overall

12%

Observational data: associations, not effects.

Further findings

Insulin therapy — Group 3
27.4%
Insulin therapy — Insulin therapy most frequent in Group 3
p < 0.001

HbA1c

Higher HbA1c in Group 3
P = 0.011

Delivery timing

Earlier delivery in Group 3
P = 0.008

Original publication

Gestational diabetes mellitus phenotypes defined by 75-g oral glucose tolerance test response patterns: associations with perinatal outcomes and persistent postpartum diabetes. Diabetes Res Clin Pract. Published 8 February 2026. doi:10.1016/j.diabres.2026.113148

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