OGT Gestational Diabetes and Pregnancy Testing 2 — Questions and Answers
Question 1: Under the IADPSG one-step criteria, which 2-hour glucose value on a 75 g OGTT diagnoses GDM during pregnancy?
- ≥140 mg/dL
- ≥153 mg/dL (Correct answer)
- ≥180 mg/dL
- ≥200 mg/dL
Correct answer: ≥153 mg/dL
The IADPSG one-step criteria set the 2-hour threshold at ≥153 mg/dL on the 75 g OGTT for diagnosing gestational diabetes.
Question 2: What is the 1-hour glucose threshold used in the IADPSG one-step 75 g OGTT for GDM diagnosis?
- ≥140 mg/dL
- ≥155 mg/dL
- ≥180 mg/dL (Correct answer)
- ≥200 mg/dL
Correct answer: ≥180 mg/dL
The IADPSG criteria specify a 1-hour threshold of ≥180 mg/dL on the 75 g OGTT as one of three diagnostic points for GDM.
Question 3: If a pregnant woman is diagnosed with GDM, which initial management step is most commonly recommended first?
- Immediate insulin therapy
- Medical nutrition therapy and blood glucose monitoring (Correct answer)
- Oral metformin
- Cesarean delivery planning
Correct answer: Medical nutrition therapy and blood glucose monitoring
Medical nutrition therapy combined with blood glucose self-monitoring is the first-line management for most women with GDM.
Question 4: Untreated gestational diabetes increases the risk of which neonatal complication?
- Neonatal jaundice only
- Macrosomia and birth trauma (Correct answer)
- Neonatal hypothyroidism
- Congenital heart defects
Correct answer: Macrosomia and birth trauma
GDM is strongly associated with fetal macrosomia (large-for-gestational-age babies), which increases the risk of shoulder dystocia and birth trauma.
Question 5: Postpartum testing after GDM should include an OGTT at which interval?
- 2 weeks postpartum
- 4–12 weeks postpartum (Correct answer)
- 6 months postpartum
- 1 year postpartum
Correct answer: 4–12 weeks postpartum
ADA recommends a 75 g 2-hour OGTT at 4–12 weeks postpartum to reassess glucose metabolism after GDM.
Question 6: What long-term risk does a history of GDM confer on the mother?
- No increased risk after delivery
- 7-fold increased risk of developing type 2 diabetes (Correct answer)
- Increased risk of gestational hypertension only
- Decreased risk of autoimmune diabetes
Correct answer: 7-fold increased risk of developing type 2 diabetes
Women with a history of GDM have approximately a 7-fold increased lifetime risk of developing type 2 diabetes compared to women with normoglycemic pregnancies.
OGT Gestational Diabetes and Pregnancy Testing 2
Under the IADPSG one-step criteria, which 2-hour glucose value on a 75 g OGTT diagnoses GDM during pregnancy?