Recruiting

Vumerity

Sponsor:

Biogen

Code:

NCT05658497

Conditions

Multiple Sclerosis

Eligibility Criteria

Sex: Female

Age: 0+

Healthy Volunteers: Not accepted

Interventions

Diroximel Fumarate

Avonex

Tysabri

Dimethyl Fumarate

Study Details

Brief summary:

The primary objectives of the study are to estimate the risk of major congenital malformations (MCMs) in infants born to women with multiple sclerosis (MS) who were exposed to diroximel fumarate (DRF) at any time from 2 weeks after the first day of their last menstrual period (LMP) up through the first trimester of pregnancy and to comparatively evaluate pregnancy outcomes with MCMs in women with MS who were exposed to DRF at any time from 2 weeks after the first day of their LMP through the first trimester of pregnancy with the following: i) women with MS who were unexposed to disease modifying therapies (DMTs) and, ii) women with MS who were exposed to other DMTs (e.g., Avonex and Tysabri Pregnancy Registries).

The secondary objective of the study is to evaluate pregnancy outcomes in women with DRF exposure at any time from 2 weeks after the first day of their LMP through the end of pregnancy compared with the following: i) women with MS who were unexposed to DMTs, ii) women with dimethyl fumarate (DMF) exposure, iii) women with MS who were exposed to other DMTs (e.g., Avonex and Tysabri Pregnancy Registries), and iv) women without MS (e.g., women from external, general population comparators).

Conditions

Multiple Sclerosis

Study ID

NCT05658497

Start date

Oct 27, 2023

Status verified date

Aug, 2026

Completion date

Jul 6, 2032

Anticipated

Primary completion date

Jul 6, 2032

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: Female

Age: 0+

Healthy Volunteers: Not accepted

Key Inclusion Criteria:

  • Participant must have a diagnosis of MS
  • Documentation that the participant was one of the following:

1. exposed to DRF at any time from 2 weeks after the first day of their LMP (i.e., conception date) up through any time during pregnancy. (If exact exposure dates are unknown, the reporter must be able to specify or estimate trimester of exposure).
2. unexposed to any DMT during pregnancy, defined as having never received DMT therapy; discontinued treatment with DRF at least 1 day before 2 weeks after the first day of their LMP (i.e., conception date); or discontinued a non Registry-specified MS DMT more than 5 times its half-life prior to 2 weeks after the first day of their LMP (i.e., conception date)
  • Participants with knowledge of the outcome of the pregnancy (e.g., pregnancy loss or live birth)

Key Exclusion Criteria:

\- None

NOTE: Other protocol defined Inclusion criteria may apply

Study Design

Enrollment

908 participants

Anticipated

Interventions and Outcome Measures

Arms

Diroximel Fumarate

Pregnant women with MS who were exposed to DRF at any time from 2 weeks after the first day of their LMP through the end of pregnancy.

Disease Modifying Therapy (DMTs) Exposed

Pregnant women with MS who were exposed to other DMTs (e.g., Avonex and Tysabri Pregnancy Registries) at any time from 2 weeks after the first day of their LMP through the end of pregnancy.

DMTs Unexposed

Pregnant women who were unexposed to DMT which is defined as either never received a DMT or discontinued treatment with DRF at least 1 day before 2 weeks after the first day of their LMP or discontinued a non-Registry-specified MS DMT more than 5 times its half-life prior to 2 weeks after the first day of their LMP.

Dimethyl Fumarate

Pregnant women with MS who were exposed to DMF at any time from 2 weeks after the first day of their LMP through the end of pregnancy.

Women Without MS

Pregnant women with external, general population comparators.

Interventions

Diroximel Fumarate

Administered as specified in the treatment arm.

Avonex

Administered as specified in the treatment arm.

Tysabri

Administered as specified in the treatment arm.

Dimethyl Fumarate

Administered as specified in the treatment arm.

Primary outcome measure

  • Number of Major Congenital Malformations (MCMs) [ Time Frame: Up to 52 weeks postdelivery ]

Central Contacts and Locations

Central contacts

US Biogen Clinical Trial Center

866-633-4636clinicaltrials@biogen.com

Global Biogen Clinical Trial Center

clinicaltrials@biogen.com

Locations

University of Colorado Anschutz Medical Campus

Recruiting

Aurora, Colorado, United States, 80045

Contacts

Principal Investigator:

Anna Shah

IQVIA US Office

Recruiting

Durham, North Carolina, United States, 27703

Contacts

Principal Investigator:

Sydney Willis

More Information

Sponsor

Biogen

Last update posted

Aug 11, 2026

Last verified

Aug, 2026

Keywords

  • Pregnancy
  • Relapsing forms of MS

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-09. This information was provided to ClinicalTrials.gov by Biogen on 2026-08-11.