['endometriosis']
['elagolix']

        Inclusion Criteria:

          -  Subject has completed the 6-Month Treatment Period in pivotal study M12-671.

          -  Agrees to use required birth control methods during the study through Month 6 of the
             Post-treatment Follow-up period

        Exclusion Criteria:

          -  Clinically significant gynecological condition

          -  Bone mineral density (BMD) loss greater than or equal to 8 percent in the spine,
             femoral neck or total hip

          -  Plans to become pregnant in the next 18 months
      