Gestational Age Indicator (Serum/plasma Protein Electrophoresis Profile)
This test analyzes protein patterns in your blood to estimate how far along you are in pregnancy. It helps doctors monitor fetal development.
["This test provides a non-invasive way to check pregnancy progress by examining blood proteins."]
Key facts at a glance
- LOINC
- 75206-3
- Short code
- GESTATIONALAGEINDICATOR
- Synonyms
- —
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- cdc-cs
- 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 recommend this test if you're at risk for complications, have had previous pregnancy issues, or if routine ultrasounds aren’t giving clear results. It helps assess fetal growth and development when ultrasound findings are uncertain.
How the Test Works
A small blood sample is taken from your arm. The protein components in your blood are separated using electrophoresis, a technique that sorts proteins based on size and charge. The resulting pattern helps estimate gestational age by comparing protein profiles to known reference ranges.
What to Expect Before the Test
No special preparation is needed. You may have a slight bruise or soreness at the injection site, but this usually fades quickly. If you’re on blood thinners, let your provider know before the test.
What to Expect After the Test
You can return to your normal activities immediately. Watch for signs of infection (fever, redness, swelling) or unusual bleeding at the site. Report any severe pain or signs of allergic reaction to your provider.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test is particularly useful when ultrasound results are inconclusive or when monitoring fetal growth in high-risk pregnancies. It can help identify potential issues early, such as growth restrictions or chromosomal abnormalities, allowing for timely medical intervention. However, it’s not a replacement for ultrasound imaging and should be used alongside other diagnostic tools.
Short name
Gestational Age Test
Frequently asked questions
How accurate is this test for determining gestational age?
Can this test detect fetal abnormalities?
Is there any risk or discomfort associated with 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