This global Belimumab Pregnancy Registry will collect prospective data on pregnancies and pregnancy outcomes on a voluntary basis in women with systemic lupus erythematosus (SLE) who have received commercially supplied belimumab within the 4 months prior to and/or during pregnancy. The registry will also evaluate outcomes of infants born to mothers who were exposed to belimumab within the 4 months prior to and/or during pregnancy. This registry will add to the current clinical experience with belimumab and will complement reproductive data from animal toxicology studies. It will also assist clinicians in weighing the potential risks against the benefits of treatment for individual patients with SLE. GlaxoSmithKline (GSK) will sponsor the Belimumab Pregnancy Registry in countries where it holds Marketing Authorization.

Inclusion Criteria:

• Pregnant women containing sufficient evidence to confirm that exposure to commercially supplied belimumab occurred within the 4 months prior to and/or during pregnancy
• Pregnant women with sufficient information to classify the pregnancy as prospective or retrospective (ie,whether the outcome of pregnancy was known at the time of first contact with the registry)
• Pregnant women with full contact information to allow for follow-up (name, address, telephone number/email address) and contact information for applicable HCPs if initial reporter is the pregnant woman
• Consent provided by the pregnant woman for her participation and assent for participation of her infant.

Exclusion Criteria:

• Reported cases that do not meet the minimum inclusion criteria for registry enrollment will be ineligible for inclusion in the registry

Women with SLE who have been exposed to commercially supplied belimumab within the 4 months prior to and/or during pregnancy will be eligible to participate in the registry as well as their infants.