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Join the Endo-Epic Study

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About The Study

The Endo-Epic Study (Endometriosis Estradiol-Mediated Pain, Inflammation, and Central Sensitization Study) is designed to explore how a hormone-suppressing medication, relugolix combination-therapy (Myfembree®), may influence pelvic pain, inflammation, and sensitivity to pain in premenopausal women who have moderate-to-severe endometriosis-associated pelvic pain.

Participants in this study will take part in a 28-week research program, which includes a 24-week period of receiving relugolix combination-therapy (Myfembree®)— a medication approved by the U.S. Food and Drug Administration for the treatment of moderate-to-severe pain associated with endometriosis. Throughout the study, participants will complete a combination of in-person and virtual visits, including brief online surveys to assess symptoms, monthly urine pregnancy tests, and specialized tests such as MRI imaging and pain sensitivity (sensory) evaluations.

Through this research, investigators aim to learn more about the biological and hormonal factors that contribute to pelvic pain in endometriosis, with the hope of informing future treatment strategies and improving quality of life for those affected.

Quick Facts

Hybrid Study

Includes four full-day in-person visits in Ann Arbor, MI as well as phone calls, and online surveys.

Please note that travel reimbursement is available for participants traveling long distances for the in person-visits.

Hormone-Based Medication

Study evaluates relugolix combination-therapy (Myfembree®).

For Premenopausal Women

Women aged 18 - 49 who have endometriosis diagnosed by surgery, ultrasound, or MRI within the last 10 years.

Compensation Provided

Participants will be compensated up to $1,345 for their time and effort.

Who Can Participate?
  • Premenopausal females aged 18–49
  • Endometriosis diagnosed by surgery, pelvic ultrasound, or MRI (within 10 years)
  • Moderate-to-severe pelvic pain for at least 6 months
  • Able to read and speak English
  • Willing to be off all hormonal medications for 30–60 days before starting study medication
  • Are willing to use non-hormonal contraception (or have prior tubal ligation)
  • Have not used injectable hormone therapy in the past 6 months
  • Willing and eligible to use relugolix combination-therapy (Myfembree®) for at least 6 months
  • Meet MRI safety requirements, including weight at or below 300 lbs.
  • No history of hysterectomy
  • Can't be pregnant, breastfeeding, or <6 months postpartum
  • No history of blood clots; uncontrolled high blood pressure; diabetes with organ damage; certain severe migraines; breast cancer or hormone-sensitive cancer; osteoporosis; undiagnosed vaginal bleeding; liver problems

What to Expect:

28-week participation. 24-week period receiving relugolix combination-therapy (Myfembree®)
9 total study visits (4 in-person, 5 phone/virtual)
Bone density scan to confirm eligibility (provided at no cost)
Monthly urine pregnancy tests
Online surveys about pain, bleeding, fatigue, and medication use
Brain MRI and sensory testing as part of study procedures

Compensation & Benefits:

Participants will be compensated up to $1,345 for their time and effort over the course of the study. This compensation acknowledges the time spent completing study visits, participating in tests and imaging, and engaging in follow-up assessments.
All study-related care, medication, and procedures — including MRI, and laboratory evaluations — are provided at no cost to participants.
Our goal is to ensure that participation is accessible, supported, and respectful of each individual’s time and contribution to advancing women’s health research.

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We’ve pulled together some basics to help you

What is the purpose of this study?

The study is designed to better understand how hormone suppression with relugolix combination-therapy (Myfembree®) affects pain, inflammation, and pain sensitivity in women with endometriosis-related pelvic pain.

Where do study visits take place?

Four in-person visits will take place in Ann Arbor, Michigan. Additional visits may occur virtually or by phone.

Is this treatment FDA-approved?

Relugolix CT (Myfembree®) is FDA-approved for treatment of moderate-to-severe pain associated with endometriosis. In this study, researchers are evaluating its effects on inflammation and pain sensitivity.

Is there any cost to join?

No. Study medication and all study tests are provided at no cost. Compensation is provided for participation.