For more information regarding Bristol-Myers Squibb Clinical Trial participation, please visit: www.BMSStudyConnect.com  Inclusion Criteria:  Diagnosis of Multiple sclerosis (MS) Currently or recently pregnant Reside in a country where ozanimod is prescribed for treatment of MS  Exclusion Criteria:  Diagnostic prenatal test results known prior to first contact with the Registry Coordination Center (RCC) Exposure to known teratogens and/or investigational medications during pregnancy  Other protocol-defined inclusion/exclusion criteria apply