['endometriosis']
['placebo', 'obe2109']

        Key Inclusion Criteria:

          -  The subject must have had her most recent surgical and - if available - histological,
             diagnosis of pelvic endometriosis up to 10 years before screening.

          -  The subject has moderate to severe endometriosis-associated pain during the screening
             period.

          -  The subject has regular menstrual cycles.

          -  The subject has a BMI ≥ 18 kg/m2 at the screening visit.

        Key Exclusion Criteria:

          -  The subject is pregnant or breast feeding or is planning a pregnancy within the
             duration of the treatment period of the study.

          -  The subject had an interventional surgery for endometriosis performed within a period
             of 60 days before screening.

          -  The subject did not respond to prior treatment with gonadotropin releasing hormone
             (GnRH) agonists or GnRH antagonists for endometriosis.

          -  The subject has a history of, or known osteoporosis or other metabolic bone disease.

          -  The subject has chronic pelvic pain that is not caused by endometriosis and requires
             chronic analgesic / therapy, or that would interfere with the assessment of
             endometriosis related pain.
      