Spinal Muscular Atrophy (SMA) Genetic Test
£641.25
- Results: 10 working days
- Genetic counselling recommended
- Walk-in available 7 days
UKAS LAB · HARLEY STREET
Spinal Muscular Atrophy (SMA) Genetic Test
Planning a pregnancy or concerned about your family history? Carrier testing for Spinal Muscular Atrophy can provide information that shapes important decisions. Most carriers have no symptoms and no family history of the condition.
Results10 working days
Time20-30m
Price£641.25
AvailabilityWalk-in available 7 days
Est. 1984
Trusted clinical caresince 1984
UKAS-accredited labsGP & consultant pathways
As Featured In
SMA genetic test in London
The spinal muscular atrophy (SMA) genetic test at Medical Express Clinic detects deletions and duplications in the SMN1 gene, the cause of SMA.
SMA is an inherited neuromuscular condition that affects the nerve cells controlling muscle movement, leading to progressive muscle weakness.
The SMA genetic test is used for carrier screening before or during pregnancy, for diagnostic testing when SMA is suspected, and for family members of someone with confirmed SMA.
SMA is inherited in an autosomal recessive pattern, so both partners should be tested when SMA carrier screening is done for pregnancy.
The SMA genetic test needs a single blood sample, and results are available within 10 working days.
The SMA genetic test costs £641.25, and genetic counselling is recommended.
The SMA genetic test can be booked online or arranged on a walk-in basis 7 days a week at 117a Harley Street, London.
How much does an SMA carrier test cost in London?
A spinal muscular atrophy (SMA) genetic test costs £641.25 at Medical Express Clinic, with results in 10 working days and genetic counselling recommended.
Testing is appropriate for:
- • Carrier screening before or during pregnancy (both partners should be tested)
- • Diagnostic testing when SMA is suspected clinically
- • Family members of someone with confirmed SMA
- • Couples with a family history of neuromuscular disease
SMA is inherited in an autosomal recessive pattern. Both parents must carry a faulty SMN1 gene for a child to be affected. Approximately 1 in 40-50 people carry one copy of the gene without symptoms, making it more common than many realise.
Why carrier testing matters: If both partners are carriers, there is a 25% chance with each pregnancy that the child will have SMA. Knowing carrier status allows for informed family planning decisions and prenatal testing options.
A reason for hope: With new treatments now available for SMA, including gene therapy, early diagnosis in affected infants significantly improves outcomes. Newborn screening for SMA is being introduced across the UK.
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Clinical lead
Dr Penny Sheehan
Health Screening, Paediatrics and Menopause • GMC 6056535
“Dr Sheehan works in women's health, menopause care and health screening. She has training and experience in weight management, including GLP-1 receptor agonist prescribing, and a special interest in paediatric assessment.”
Service information reviewed 26 August 2026.
FAQs
SMA genetic test FAQs
Should my partner also be tested?
If you're a carrier, your partner should be tested. If only one parent is a carrier, the child cannot be affected (though they may be a carrier themselves).
How is the test done?
A simple blood sample is all that's needed. Results are available within 10 working days.
What if we're both carriers?
Genetic counselling can discuss your options, which may include prenatal testing, preimplantation genetic diagnosis (PGD) with IVF, or preparing for the possibility of an affected child.
