Home › Infertility › NCT03011684
Fertility Preservation Using Tamoxifen and Letrozole in Estrogen Sensitive Tumors Trial
Who can join
Ages 18 to 50 · Women
Full eligibility criteria
Inclusion Criteria: * New breast cancer diagnosis * Has not yet begun chemotherapy * Desires to undergo ovarian stimulation and oocyte retrieval prior to cancer treatment * Age 18 years old or greater Exclusion Criteria: * Chemotherapy has already commenced or been completed * History of recurrent breast cancer (with a prior history of chemotherapy) * Stage IV breast cancer diagnosis (metastases remote from the breast) * Patient's oncologist advises against the trial - in which case they can choose to receive stimulation with letrozole+gonadotropin * Does not plan to undergo ovarian stimulation and oocyte retrieval prior to diagnosis * 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 * Age less than 18 years old
About the study
Latrogenic infertility as a result of cancer treatment has a profound effect on long-term quality of life in survivors of reproductive-age cancers. Oocyte cryopreservation prior to cancer treatment has been associated with improved quality of life, with a potential ability to reduce long-term decision-related regret in cancer survivors. Though letrozole plus gonadotropin and and tamoxifen plus gonadotropin are currently routinely used worldwide in ovarian stimulation cycles for fertility preservation in patients with estrogen-receptor-positive breast cancer, it is not clear which of the two might lead to improved oocyte yield. Improved knowledge about the efficacy of these medications, with regard to oocyte yield, has the potential to significantly improve quality of life in reproductive-age breast cancer survivors.
What is being tested
- Tamoxifen (drug)
- Letrozole (drug)
Sponsor: University of California, San Francisco · Participants: 309 · Started: Jul 21, 2016
Contact the study team
- Rebecca Wong · Phone: 415-353-4305
Official record on ClinicalTrials.gov — NCT03011684
Locations in the U.S.
| California | University of California at San Francisco, San Francisco |
Conditions
From ClinicalTrials.gov, data retrieved Oct 2, 2026. Each study sets its own eligibility; the study team decides who can join.