A 30-week pregnant woman undergoes a 75g OGTT. Fasting glucose: 88 mg/dL; 1-hour: 182 mg/dL; 2-hour: 148 mg/dL. According to IADPSG/WHO 2013 criteria, what is the diagnosis?

• A Gestational diabetes mellitus (GDM) ✓
• B Normal glucose tolerance
• C Diabetes in pregnancy (overt diabetes)
• D Impaired fasting glucose only — repeat in 4 weeks

Explanation

IADPSG/WHO 2013 criteria for GDM (any ONE threshold met): fasting ≥92 mg/dL, 1-hour ≥180 mg/dL, or 2-hour ≥153 mg/dL. This woman has a 1-hour value of 182 mg/dL (≥180 mg/dL), meeting GDM criterion. Overt diabetes in pregnancy requires fasting ≥126 mg/dL or 2-hour ≥200 mg/dL. Her fasting of 88 mg/dL and 2-hour of 148 mg/dL do not meet those thresholds, but the 1-hour value alone establishes GDM.

Reference: Williams Obstetrics, 26th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.