Evaluating pregnancy outcomes in women with spinal muscular atrophy exposed to Spinraza
Official title: Spinraza (Nusinersen) SMA Pregnancy Exposure Study Within Existing SMA Registries
Run by Biogen · NCT05789758 · Data updated 2026-11-12
This study is trying to see how pregnancy goes for women with spinal muscular atrophy who have used Spinraza, compared to women without the condition who haven't used the drug.
Quick facts
| Study type | Observational |
|---|---|
| Ages | 18 Years to 54 Years |
| Sex | Women only |
| Enrollment | 20 (estimated) |
| Sponsor | Biogen Industry-sponsored |
| Locations | 14 sites (Palo Alto, California and 13 other locations) |
| Status | Recruiting |
| Started | December 15, 2023 |
| Main results expected | October 31, 2032 |
| Study ends | October 31, 2033 |
| Registry record updated | March 9, 2026 |
| Trial ID | NCT05789758 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates include pregnant women with genetically documented spinal muscular atrophy linked to chromosome 5q who have been exposed to nusinersen within the specified timeframes.
✕Probably not a fit
Patients who are not pregnant or those who have not been exposed to nusinersen during the relevant periods will not benefit from this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This observational study aims to assess pregnancy complications and outcomes in women with spinal muscular atrophy (SMA) who have been exposed to nusinersen, also known as Spinraza, during specific timeframes related to conception and pregnancy. It will compare these outcomes with those of women without SMA who were not exposed to nusinersen. The study will utilize existing SMA registries in the US, UK, and parts of Europe to gather data on both maternal and infant health outcomes. By focusing on this unique population, the study seeks to provide insights into the safety and effects of nusinersen during pregnancy.
Why it matters
Potential benefit: If successful, this study could provide critical information on the safety of nusinersen exposure during pregnancy, guiding treatment decisions for women with SMA.
How similar studies have gone: While there may be studies on SMA treatments, this specific focus on nusinersen exposure during pregnancy is novel and has not been extensively tested.
Who can join: the full rules
Show full inclusion / exclusion criteria
Key Inclusion Criteria: * Participant who is currently pregnant (or was pregnant during the relevant exposure window) and enrolled in the United States (US) network of the ISMAR registry, the United Kingdom (UK) Adult SMA REACH, or the Germany, Austria, or Switzerland network of the SMArtCARE registry * Genetic documentation of spinal muscular atrophy linked to chromosome 5q (5q SMA) * Documentation that the participant was exposed to nusinersen up to 14 months prior to the first day of their LMP before conception, 14.5 months before conception, and/or at any time during their pregnancy Key Exclusion Criteria: * Treatment with risdiplam at any time from the first day of their LMP, 2 weeks prior to the date of conception (approximately 5 half-lives), and/or plans to receive treatment with risdiplam during pregnancy NOTE: Other protocol defined Inclusion/Exclusion criteria may apply
Where it's running
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Stanford Neuroscience Health Center
Palo Alto, California, United States Recruiting -
Boston Children's Hospital
Boston, Massachusetts, United States Recruiting -
Columbia University Irving Medical Center
New York, New York, United States Recruiting -
University College London Hospitals NHS Foundation Trust
London, Greater London, United Kingdom Recruiting -
St George's University NHS Foundation Trust
London, Greater London, United Kingdom Recruiting -
The Northern Care Alliance NHS Foundation Trust
Salford, Greater Manchester, United Kingdom Recruiting
Show 8 more locations
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University Hospital Southampton NHS Foundation Trust
Southampton, Hampshire, United Kingdom Recruiting -
Nottingham University Hospitals Trust
Nottingham, Nottinghamshire, United Kingdom Recruiting -
The Robert Jones and Agnes Hunt Orthopaedic Hospital NHS Foundation Trust
Oswestry, Shropshire, United Kingdom Recruiting -
Sheffield Teaching Hospitals NHS Foundation Trust
Sheffield, South Yorkshire, United Kingdom Recruiting -
The Newcastle upon Tyne Hospitals NHS Foundation Trust
Newcastle upon Tyne, Tyne and Wear, United Kingdom Recruiting -
University Hospitals Birmingham NHS Foundation Trust
Birmingham, West Midlands, United Kingdom Recruiting -
North Bristol NHS Trust
Bristol, United Kingdom Recruiting -
Research Site
Cambridge, Massachusetts, United States Active not recruiting
Study contacts
- Study coordinator: US Biogen Clinical Trial Center
- Email: clinicaltrials@biogen.com
- Phone: 866-633-4636
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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Salanersen after early gene therapy in babies with SMA
This study tests whether adding salanersen (BIIB115) after early gene therapy with Onasemnogene abeparvovec helps babies with SMA.
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Salanersen given before symptoms to help movement in babies with genetic SMA
This study will try salanersen in newborns with genetically confirmed SMA who have 2 or 3 copies of SMN2 to see if starting treatment before symptoms prevents or lessens movement problems.
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Understanding how nusinersen is processed in the body using a new delivery system for spinal muscular atrophy
This study is testing a new way to deliver the medication nusinersen for spinal muscular atrophy to see how it works in the body compared to the usual method.
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Observing the natural history of spinal muscular atrophy
This study is trying to understand how spinal muscular atrophy affects patients over time by looking at their experiences and health data from both treated and untreated individuals.
-
Pregnancy-time treatment of fetal SMA: a registry of mother-child outcomes
This registry collects information on pregnancies where a fetus diagnosed with spinal muscular atrophy was treated with a disease‑modifying therapy in the womb to see how the pregnancy and baby fare after birth.
-
Intrathecal Zolgensma in spinal muscular atrophy patients in Japan
This study tests the safety and real‑world effectiveness of intrathecal onasemnogene abeparvovec in SMA patients in Japan.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.