Endometriosis and Microvascular Dysfunction; Simvastatin and Duavee

Purpose: To determine the effects of SERM and simvastatin interventions on endothelial dysfunction in women with endometriosis. Hypothesis: Treatment with the SERM (bazedoxifene + conjugated estrogen) or with simvastatin will decrease systemic inflammation and improve specific measures of cardiovascular function including endothelium-dependent vasodilation.

Inclusion Criteria: * Women between the ages of 18 and 45 years with endometriosis (diagnosis by prior laparoscopy by subject's own physician \140/90 * Taking pharmacotherapy that could alter peripheral vascular control (e.g. insulin sensitizing, cardiovascular medications) * Pregnancy * Breastfeeding * Taking illicit and/or recreational drugs * Abnormal liver function * Rash, skin disease, disorders of pigmentation, known skin allergies * Diagnosed or suspected metabolic or cardiovascular disease * Persistent unexplained elevations of serum transaminases * Known allergy to latex or investigative substances