👤 By the CinnaRN Clinical Content Team🕐 Updated 2026-08-23🏷️ Physiological Adaptation🔖 Free to read, print, and share
Also known as: pregnancy diabetes · diabetes in pregnancy · GDM · high blood sugar in pregnancy
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Use this quick-reference guide to spot, treat, and prevent Gestational Diabetes on the NCLEX. Keep it handy during review and on exam day!
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📒 The 1-minute cheat sheet
📌 Screen
50g GCT at 24-28 wks
Fail → 3-hr OGTT confirms
📌 Risk
Macrosomia → shoulder dystocia
Neonatal hypoglycemia after birth
🧪 Meds
Diet + exercise first-line
Insulin if needed (oral often used too)
🎓 Teach
Monitor glucose, controlled-carb diet
Resolves postpartum, recheck 6-12 wks
📚 Gestational Diabetes — full study notes
The cheat sheet above is your quick recall card. These notes go deeper — what it is, what to do first, what must be reported, and what to teach.
Gestational diabetes mellitus (GDM) is glucose intolerance first recognized during pregnancy, caused by placental hormones (such as human placental lactogen) that increase insulin resistance. It typically appears in the second or third trimester and usually resolves after delivery. It matters because uncontrolled maternal hyperglycemia leads to a macrosomic infant, birth trauma, and neonatal hypoglycemia after birth.
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Key points
Understand these first
Placental hormones create insulin resistance, so maternal blood glucose rises, especially after meals.
Excess maternal glucose crosses the placenta and stimulates fetal insulin, producing macrosomia (large infant).
After birth the high fetal insulin level persists briefly, causing neonatal hypoglycemia.
Maternal complications include preeclampsia, polyhydramnios, and an increased rate of cesarean birth.
Screening is done with a 1-hour 50 g glucose challenge, confirmed by a 3-hour 100 g oral glucose tolerance test, usually at 24-28 weeks.
Women with GDM have a higher lifetime risk of developing type 2 diabetes.
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Nursing priorities
What to do, in order
Teach and reinforce a controlled-carbohydrate diet and regular physical activity as first-line management.
Instruct on home blood glucose self-monitoring (fasting and postprandial values) and recording results.
Administer insulin as prescribed when diet and exercise do not control glucose (insulin is the preferred drug in pregnancy).
Monitor fetal growth and well-being with ultrasound and nonstress tests as ordered.
After delivery, monitor the newborn closely for hypoglycemia and feed early.
Report signs of macrosomia or polyhydramnios, which raise the risk of shoulder dystocia and birth injury.
Assess the newborn for jitteriness, poor feeding, or lethargy, which signal neonatal hypoglycemia requiring immediate feeding or glucose.
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Labs & values
Numbers to know
Fasting blood glucose target in pregnancy: under 95 mg/dL
1-hour postprandial target: under 140 mg/dL; 2-hour target: under 120 mg/dL
Hemoglobin A1c: ideally under 6% in pregnancy
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Patient teaching
What patients must know
Check and log blood glucose at the times your provider specifies, and bring records to each visit.
Follow the prescribed meal plan with consistent carbohydrate amounts and avoid concentrated sugars.
Get tested for type 2 diabetes after the postpartum period because GDM raises your future risk.
❓ Gestational Diabetes: NCLEX FAQs
What are the priority nursing interventions for Gestational Diabetes?
Teach and reinforce a controlled-carbohydrate diet and regular physical activity as first-line management. Instruct on home blood glucose self-monitoring (fasting and postprandial values) and recording results. Administer insulin as prescribed when diet and exercise do not control glucose (insulin is the preferred drug in pregnancy). Monitor fetal growth and well-being with ultrasound and nonstress tests as ordered.
What are the warning signs of Gestational Diabetes a nurse must report?
Report fasting glucose consistently above 95 mg/dL or postprandial values above target, indicating poor control. Report signs of macrosomia or polyhydramnios, which raise the risk of shoulder dystocia and birth injury. Assess the newborn for jitteriness, poor feeding, or lethargy, which signal neonatal hypoglycemia requiring immediate feeding or glucose.
What do I need to know about Gestational Diabetes for the NCLEX?
Placental hormones create insulin resistance, so maternal blood glucose rises, especially after meals. Excess maternal glucose crosses the placenta and stimulates fetal insulin, producing macrosomia (large infant). After birth the high fetal insulin level persists briefly, causing neonatal hypoglycemia. Maternal complications include preeclampsia, polyhydramnios, and an increased rate of cesarean birth.
What patient teaching is important for Gestational Diabetes?
Check and log blood glucose at the times your provider specifies, and bring records to each visit. Follow the prescribed meal plan with consistent carbohydrate amounts and avoid concentrated sugars. Get tested for type 2 diabetes after the postpartum period because GDM raises your future risk.
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Quick Tip
Placental hormones create insulin resistance, so maternal blood glucose rises, especially after meals.