NCT04002141CompletedPhase 2
Assessment and Prevention of Pain During Ovarian Stimulation in Patients With Endometriosis
Source: ClinicalTrials.gov · Last updated 28 Jan 2026
Brief summary (registry, in English)
Randomized double blinded placebo-controlled trial to evaluate the impact of ovarian hyperstimulation on endometriosis-related symptoms and to evaluate the impact of letrozole use during ovarian hyperstimulation with respect to endometriosis-related symptoms, embryo/egg quality and quantity, and pregnancy rates.
- Status (registry)
- Completed
- Phase (registry)
- Phase 2
- Study type
- Interventional
- Enrollment
- 60 (actual)
- First submitted
- 28 May 2019
- Start date
- 17 Sept 2019
- Primary completion date
- 1 Oct 2023
- Lead sponsor
- University of California, San Francisco
- Diseases
- Endometriosis
- NCT number
- NCT04002141
What you commit to
- Study type: Interventional · Phase 2
- Participants enrolled: 60
- From 17 Sept 2019 to the primary completion date, 1 Oct 2023
- 1 site in 1 country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Prior treatment
- Any significant concurrent disease, illness, or psychiatric disorder that would compromise patient safety or compliance, interfere with consent, study participation, follow-up, or interpretation of study results
Other illness
- Hypersensitivity to letrozole
Who the study is looking for
- Age 18-42 years
- Planning to undergo controlled ovarian hyperstimulation
- Prior diagnosis of endometriosis by one of the following: (1) surgical diagnosis (2) endometrioma on pelvic ultrasound
- Planning to freeze all retrieved oocytes/embryos prior to transfer
Age in the registry: 18 years to 42 years · Sex: Female · Accepts healthy volunteers
Sites (1)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| UCSF Center for Reproductive Health Coordinator of this site? Confirm its status | San Francisco | United States | Unknown status |
This page is information, not medical advice. Discuss any trial with your doctor.