Chromosome Array Analysis for Chromosome 3 (Array Comparative Genomic Hybridization, CGH)
This test checks for changes in the genetic material (DNA) on chromosome 3, which may be linked to certain genetic conditions or developmental issues.
["Helps identify possible genetic abnormalities that could affect growth, development, or health."]
Key facts at a glance
- LOINC
- 94403-3
- Short code
- CHRNA3 c.645C>T Geno Bld/T
- Synonyms
- CHRNA3 c.645C>T Geno Bld/T
- Category
- chemistry
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- molgen
- Specimen volume
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
What This Test Measures
The test uses a specialized DNA analysis method to compare your genetic material against a reference sample. It looks for differences in the amount of DNA on chromosome 3, which could indicate gains or losses of genetic material. These changes might be associated with genetic disorders or other conditions that affect development or health.
Why It Might Be Ordered
Your healthcare provider may recommend this test if you or your child show signs of developmental delays, physical abnormalities, or other symptoms that might be linked to genetic issues. It could also be used in cases of recurrent miscarriages, infertility, or when other tests suggest a genetic component to a health problem.
Sample Collection and Preparation
A blood sample is typically taken to collect DNA for testing. Sometimes, other samples like saliva may be used, depending on the clinical situation. The sample is processed in a lab to analyze the genetic material on chromosome 3.
Test Results and Interpretation
Results are compared to a standard reference to identify any unusual patterns in chromosome 3. The findings are reviewed by a genetic specialist who will discuss the results with you and your healthcare provider to understand their potential implications.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Chromosome abnormalities detected by this test can indicate conditions such as developmental disorders, intellectual disabilities, or physical health issues. While some changes may be harmless, others could be associated with genetic syndromes or increased risk for certain health problems. Genetic counselors can help explain the meaning of your results and next steps based on your specific situation.
Short name
Chromosome 3 Array Test
Frequently asked questions
How long does it take to get my test results?
What does it mean if my test shows a change in chromosome 3?
Can this test be used for prenatal screening?
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