Bone Mineral Density in Women With Uterine Fibroids or Endometriosis

Inclusion Criteria:

1. Is a premenopausal female 18 to 50 years old
2. By the participant's report, had two consecutive regular menstrual cycles immediately prior to enrollment in the study. Participants with hormonal intrauterine devices or on other hormonal contraception methods that disrupt cyclic bleeding are not required to have two consecutive regular menstrual cycles.
3. Has one of the following conditions:

   1. Diagnosis of uterine fibroids that is confirmed by an ultrasound within 5 years prior to screening.
   2. Diagnosis of endometriosis confirmed by surgical or direct visualization and/or histopathologic confirmation.
4. Has not and is not expected to undergo a surgical procedure with bilateral oophorectomy within the 12 months following enrollment.

   Exclusion Criteria:
5. Has a weight that exceeds the weight limit of the dual-energy X-ray absorptiometry scanner
6. Has a baseline BMD z-score \< -2.0 at spine, total hip, or femoral neck
7. Has a history of or currently has osteoporosis, or other metabolic bone disease
8. Use within the past 3 months prior to Screening or anticipated use of systemic glucocorticoids
9. Is currently pregnant or lactating, or intends to become pregnant during the study period