This is a double-blind study, involving (goal) 20 women with SLE. All will be premenopausal with regular menstrual cycles. Patients will meet at least four of the criteria of the American Colleges of Rheumatology for classification of SLE. Disease activity will be determined by SLE disease activity index called SLEDAI scores. Patients can take meds to control their disease, but none will be able to take birth control pills/patches, or hormone replacement at the time of the study. The pharmacy will be in control of the blind and 10 will get ICI 182,780 (Faslodex) and 10 will get placebo. Lab will be drawn before each injection and a bone density will be done on injection 1 and 12, the injections will be monthly, depending on the female's cycle. A visit will be done at month 15 to evaluate SLEDAI, and draw lab as well. Each vs will have a SLEDAI done with the clinical evaluation. The injection is 250mg/5cc, which is divided into 2 injections of 2.5cc each, given IM, on day 4-10 of each cycle.
