Spinal Muscular Atrophy Carrier Screening Test
Short Name: SMA Carrier Screening
Also known as: SMA Carrier Test, SMN1 Gene Carrier Screening, Spinal Muscular Atrophy Carrier Detection
Spinal Muscular Atrophy Carrier Screening Test test available at DNA Labs India for ₹14,000. Uses MLPA on Peripheral blood samples. Results in 7-10 days. Free home collection in 300+ cities across India.
🩺 Medically Reviewed By
Dr SULOCHANA HEMCHANDRA HOLLA
Consultant Medical Geneticist · Reg: 8532
Last reviewed: September 7, 2026
Overview
The purpose of SMA Carrier Screening is to determine if an individual carries a mutation in the SMN1 gene, which causes Spinal Muscular Atrophy. This information is vital for assessing the risk of having a child with SMA and guiding reproductive decisions, including prenatal testing and genetic counseling.
- Test Code
- 3216
- Price
- ₹14,000
- Sample Type
- Peripheral blood
- Result Time
- 7-10 days
- Fasting Required
- No
- Method
- MLPA
Sample Collection
No special preparation is required. Ensure a doctor's prescription is available if applicable, though it may not be needed for certain cases like pregnancy planning.
Method: Venipuncture
Laboratory Analysis
A trained phlebotomist will draw a blood sample from a vein in your arm using a sterile needle and EDTA vacutainer.
Report Delivery
Apply gentle pressure to the puncture site with a cotton ball to prevent bleeding. You can resume normal activities immediately.
Timeline: 7-10 days
Patient Instructions
About This Test
Who Should Get This Test
The purpose of SMA Carrier Screening is to determine if an individual carries a mutation in the SMN1 gene, which causes Spinal Muscular Atrophy. This information is vital for assessing the risk of having a child with SMA and guiding reproductive decisions, including prenatal testing and genetic counseling.
How to Prepare
- Wear loose-fitting clothing for easy access to the arm
- Stay hydrated before the test
- Inform the technician of any bleeding disorders or medications
- Avoid strenuous activity with the arm used for collection for a few hours
Doctor's Notes
Reviewed by Dr SULOCHANA HEMCHANDRA HOLLA — MBBS, MD (Medical Genetics) · Reg. No. 8532
"Carrier screening for SMA is a critical step in reproductive health planning, helping couples understand their risk and make informed decisions."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Hemolyzed or clotted blood sample
- Insufficient sample volume (less than 2 ml)
- Use of incorrect container (not EDTA vacutainer)
- Unlabeled or mislabeled sample
Understanding Your Results
2 copies of SMN1 gene
Normal, not a carrier of SMA mutation
1 copy of SMN1 gene
Carrier of SMA mutation; risk of passing to offspring
0 copies of SMN1 gene
Likely affected by SMA; requires diagnostic testing for confirmation
If you are found to be a carrier, consult a genetic counselor or healthcare provider to discuss family planning options, prenatal testing, and potential risks for future children.
Limitations
- ⚠May not detect all rare or novel SMN1 mutations
- ⚠Does not diagnose SMA in symptomatic individuals; diagnostic testing required
- ⚠Carrier status does not predict disease severity or onset
Risks & Considerations
- ●Minor bruising or pain at the puncture site
- ●Rare risk of infection or excessive bleeding
- ●Lightheadedness or dizziness during blood draw
Interfering Factors
- ●Contaminated or hemolyzed blood sample
- ●Improper sample storage or handling
- ●Recent blood transfusion affecting DNA analysis
Compare With Similar Tests
| Test | Spinal Muscular Atrophy Carrier Screening | SMA Diagnostic Test | Prenatal SMA Testing |
|---|---|---|---|
| Comparison | Spinal Muscular Atrophy Carrier Screening |
Frequently Asked Questions
What is Spinal Muscular Atrophy Carrier Screening?
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What does a positive result mean?
What is the cost of SMA Carrier Screening at DNA Labs India?
Is home sample collection available for this test?
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Is genetic counseling recommended after carrier screening?
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