This is an open label, extension study for subjects completing the ZPU-003 Ext 1 study and an off-drug interval (menses), prior to the start of the first 16-week dosing cycle. Subjects will receive a 50 mg Proellex® daily dose. Total study participation for ZPU-003 Ext 2 (Extension 2) may be up to three 4 month drug cycles separated by off drug intervals.