Los Angeles, California 90033

  • Oral Contraceptive


The purpose of this research study is to gain a better understanding of the changes that may occur in the breast when a woman uses an oral contraceptive (birth control pill). Some research indicates that women who use birth control pills with lower amounts of estrogen (a hormone in the birth control pill) may have lower breast cell growth than women who use birth control pills with a higher amount of estrogen; this research will examine that in detail. This research will also test whether the results found in HS-07-00269 can be confirmed.


Inclusion Criteria: 1. Age 18-35 2. BMI <30 kg/m2 3. Premenopausal with regular cycles or currently taking an OC 4. Not currently or recently pregnant or nursing (within previous 6 months) 5. Non-smoker 6. No use of antibiotics within the prior 4 weeks 7. Competent to provide written informed consent (as judged by study team) 8. Willing to adhere to the OC regimen 9. Willingness to refrain from the use of aspirin or NSAIDS 10 days pior to the biopsy appointment and one week following the biopsy procedure 10. Willing and able to refrain from use of fish oils 10 days prior to the biopsy appointment and one week following the biopsy procedure Exclusion Criteria: 1. Diabetes 2. Abnormal breast examination 3. Abnormal PT/INR and/or CBC with platelets test results (as determined by one of the study physicians) 4. History or current therapeutic or prophylactic use of anticoagulants 5. Known bleeding disorder or history of unexplained bleeding or bruising 6. History of breast cancer or previous diagnostic breast biopsy 7. Known allergy to local anesthetic



Primary Contact:

Principal Investigator
Heather MacDonald, M.D.
University of Southern California

Anna H Wu, Ph.D.
Phone: 323 865 0484
Email: annawu@usc.edu

Backup Contact:

Email: vasquezc@usc.edu
Leticia Vasquez-Caldera, B.A.
Phone: 323 865 0407

Location Contact:

Los Angeles, California 90033
United States

There is no listed contact information for this specific location.

Site Status: Recruiting

Data Source: ClinicalTrials.gov

Date Processed: September 27, 2021

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