Glucose in Pregnancy (Serum, Substance Concentration)
This test measures the amount of glucose (sugar) in your blood drawn from a vein during pregnancy. It helps monitor how your body handles sugar, especially important for managing diabetes or risk of gestational diabetes.
["This test assesses your blood sugar levels during pregnancy to prevent complications like high blood pressure or birth defects."]
Key facts at a glance
- LOINC
- 54400-7
- Short code
- Glucose pre Gc SerPl-sCnc
- Synonyms
- Glucose pre Gc SerPl-sCnc
- Category
- glucose
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 70
- Ref high
- 100
- Critical range
- 50 N/A – 400 N/A
- Fasting
- true
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 82947
- SNOMED
- 260395008
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why This Test Is Done
Your healthcare provider may order this test if you have symptoms like excessive thirst, frequent urination, or unexplained weight changes. It’s also commonly checked during routine prenatal visits, especially if you have risk factors like obesity, family history of diabetes, or previous gestational diabetes.
When to Expect Results
Results are typically available within 1–3 business days, depending on your lab. You’ll usually receive a call or email with your results from your healthcare provider.
What to Expect Before the Test
No special preparation is needed, but you may be asked to fast for 8–12 hours before the test if it’s part of a glucose tolerance screening. Otherwise, you can eat and drink normally.
What to Expect During the Test
A healthcare professional will insert a small needle into a vein in your arm to draw blood. You may feel a brief pinch, but it’s usually over quickly. The process takes just a few minutes.
Reference range
Fasting: 70-100 mg/dLN/A
Fasting for 8-12 hours required. Water is permitted. Avoid chewing gum and smoking before the test.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Abnormally high or low glucose levels during pregnancy can indicate gestational diabetes, preeclampsia, or other metabolic issues. Early detection allows for timely interventions, such as diet changes, medication, or monitoring to ensure a healthy pregnancy and baby.
Short name
Pregnancy Glucose Level
Frequently asked questions
How often is this test done during pregnancy?
What happens if my glucose level is high?
Can I eat or drink before this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy