Estimated Gestational Age Based on Selected Delivery Date (Qualitative Assessment)
This test uses your expected delivery date to estimate how far along you are in your pregnancy, based on medical guidelines. It does not measure biological markers but relies on a calculated timeline.
["This is a non-invasive way to confirm your pregnancy timeline."]
Key facts at a glance
- LOINC
- 11887-7
- Short code
- GA Est from selected delivery date
- Synonyms
- GA Est from selected delivery date
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- estimated-from-selected-delivery-date
- 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
How This Test Works
Your healthcare provider will use your reported due date to calculate your estimated gestational age. This is a standard practice in prenatal care to track pregnancy progression. The test does not involve blood, urine, or other bodily fluids; it’s purely a date-based calculation based on your medical record.
What to Expect During the Test
No preparation is needed for this test. You’ll simply provide your expected delivery date to your healthcare provider, who will then record it in your medical chart. Results are typically available immediately and used to guide prenatal care planning.
When This Test Is Ordered
This test is commonly ordered at the time of pregnancy confirmation or during early prenatal visits to establish a baseline gestational age. It helps ensure accurate timing for ultrasounds, medication dosing, and monitoring fetal development.
Potential Limitations
While this test is reliable for establishing a timeline, it does not account for potential variations in ovulation timing or early pregnancy complications. If your symptoms or ultrasound results suggest a discrepancy, your provider may use additional tests (like early ultrasound) for confirmation.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
Gestational Age Estimate
Frequently asked questions
Why is this test important?
What if my results differ from my expected due date?
Does this test require fasting or special preparation?
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