Clinical trial Recruiting at 13 sites Observational Ages 18 to 54 Women only

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.

More Spinal Muscular Atrophy trials

Quick facts

Study typeObservational
Ages18 Years to 54 Years
SexWomen only
Enrollment20 (estimated)
SponsorBiogen
Industry-sponsored
Locations14 sites (Palo Alto, California and 13 other locations)
StatusRecruiting
StartedDecember 15, 2023
Main results expectedOctober 31, 2032
Study endsOctober 31, 2033
Registry record updatedMarch 9, 2026
Trial IDNCT05789758 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

  • 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
  • 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

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.