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Showing 1–24 of 749 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Condition: Estrogen Clear all
Completed Phase 2 Interventional Results available

Estradiol Levels in Patients Treated With Estring

NCT01923298
View directory record Official record
Conditions
Estrogen Levels Among Breast Cancer Patients
Interventions
Estradiol
Drug
Lead sponsor
University of Arizona
Other
Eligibility
18 Years and older
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2019
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Feb 9, 2022 · Synced Sep 4, 2026, 1:02 AM EDT
Active, not recruiting Phase 2 Interventional

(Z)-Endoxifen for the Treatment of Premenopausal Women With ER+/HER2- Breast Cancer

NCT05607004
View directory record Official record
Conditions
Breast Neoplasms, Invasive Breast Cancer, Estrogen-receptor-positive Breast Cancer, HER2-negative Breast Cancer
Interventions
(Z)-endoxifen, goserelin
Drug
Lead sponsor
Atossa Therapeutics, Inc.
Industry
Eligibility
18 Years and older · Female only
Enrollment
87 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
14
States / cities
Phoenix, Arizona • Tucson, Arizona • Los Angeles, California + 11 more
Source: ClinicalTrials.gov public record
Updated Jul 7, 2026 · Synced Sep 4, 2026, 1:02 AM EDT
Recruiting Phase 1Phase 2 Interventional

Study of Abemaciclib and Elacestrant in Participants With Brain Metastasis Due to ER+/HER-2- Breast Cancer

NCT05386108
View directory record Official record
Conditions
Breast Neoplasms, Brain Neoplasms, Neoplasms by Site, Neoplasms, Breast Diseases, Central Nervous System Neoplasms, Brain Diseases, Central Nervous System Diseases
Interventions
Elacestrant, Abemaciclib
Drug
Lead sponsor
Stemline Therapeutics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
73 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
11
States / cities
Fullerton, California • Los Angeles, California • Urbana, Illinois + 8 more
Source: ClinicalTrials.gov public record
Updated Aug 5, 2026 · Synced Sep 4, 2026, 1:02 AM EDT
Completed Not applicable Interventional Results available

Pilot Study of Femring Estrogen Supplementation During Depo-Provera Initiation

NCT00563576
View directory record Official record
Conditions
Metrorrhagia
Interventions
Femring®, DepoProvera ®
Drug
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older · Female only
Enrollment
71 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 14, 2021 · Synced Sep 4, 2026, 1:02 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Effect of Dietary Soy on Estrogens in Breast Fluid, Blood, and Urine Samples From Healthy Women

NCT00513916
View directory record Official record
Conditions
Breast Cancer, Healthy, no Evidence of Disease
Interventions
soy isoflavones
Dietary Supplement
Lead sponsor
University of Hawaii Cancer Research Center
Other
Eligibility
30 Years to 45 Years · Female only
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2012
U.S. locations
1
States / cities
Honolulu, Hawaii
Source: ClinicalTrials.gov public record
Updated Dec 18, 2013 · Synced Sep 4, 2026, 1:02 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Estrogen and Serotonin on Changing Brain Chemistry

NCT01208324
View directory record Official record
Conditions
Menopause
Interventions
estrogen patch, Amino acids, Placebo Patch, Placebo pills
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
48 Years to 60 Years · Female only
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2018
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 1, 2021 · Synced Sep 4, 2026, 1:02 AM EDT
Recruiting Phase 1Phase 2 Interventional

First-in-Human Study of Tersolisib (STX-478) as Monotherapy and in Combination With Other Antineoplastic Agents in Participants With Advanced Solid Tumors

NCT05768139
View directory record Official record
Conditions
Breast Cancer, Solid Tumors, Adult
Interventions
STX-478, Fulvestrant, Ribociclib, Palbociclib, Letrozole, Anastrozole, Exemestane, Tamoxifen, Abemaciclib, Imlunestrant, Metformin
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years and older
Enrollment
880 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2030
U.S. locations
28
States / cities
Los Angeles, California • San Francisco, California • Aurora, Colorado + 22 more
Source: ClinicalTrials.gov public record
Updated Jul 6, 2026 · Synced Sep 4, 2026, 1:02 AM EDT
Completed Phase 2 Interventional Results available

North American Study of Epistaxis in Hereditary Hemorrhagic Telangiectasia (HHT)

NCT01408030
View directory record Official record
Conditions
Telangiectasia, Hereditary Hemorrhagic, Epistaxis
Interventions
Sterile saline, Bevacizumab, Estriol, Tranexamic Acid
Drug
Lead sponsor
James Gossage
Other
Eligibility
18 Years and older
Enrollment
123 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
6
States / cities
Los Angeles, California • Augusta, Georgia • Baltimore, Maryland + 3 more
Source: ClinicalTrials.gov public record
Updated Oct 18, 2018 · Synced Sep 4, 2026, 1:02 AM EDT
Terminated Phase 1Phase 2 Interventional Results available

Phase 1/2 Study of Amcenestrant (SAR439859) Single Agent and in Combination With Other Anti-cancer Therapies in Postmenopausal Women With Estrogen Receptor Positive Advanced Breast Cancer

NCT03284957
View directory record Official record
Conditions
Breast Cancer
Interventions
Amcenestrant, Palbociclib, Alpelisib, Everolimus, Abemaciclib
Drug
Lead sponsor
Sanofi
Industry
Eligibility
18 Years and older · Female only
Enrollment
136 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2024
U.S. locations
4
States / cities
Aurora, Colorado • Boston, Massachusetts • New York, New York + 1 more
Source: ClinicalTrials.gov public record
Updated Nov 23, 2025 · Synced Sep 4, 2026, 1:02 AM EDT
Completed Phase 2 Interventional Results available

Umbrella Trial of Subtype-Targeted Therapies in ER+/HER2- Breast Cancer

NCT05101564
View directory record Official record
Conditions
Breast Cancer, HER2-negative Breast Cancer, ER Positive Breast Cancer
Interventions
Alpelisib, Tamoxifen, Zotatifin, Fulvestrant
Drug
Lead sponsor
Jennifer Lee Caswell-Jin
Other
Eligibility
18 Years and older
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Feb 11, 2026 · Synced Sep 4, 2026, 1:02 AM EDT
Active, not recruiting Phase 2 Interventional Accepts healthy volunteers

Advancing Postmenopausal Preventive Therapy

NCT04103476
View directory record Official record
Conditions
Atherosclerosis, Cognitive Decline
Interventions
Oral bazedoxifene 20 mg / conjugated estrogens 0.45 mg, Placebo
Combination Product · Other
Lead sponsor
University of Southern California
Other
Eligibility
45 Years to 59 Years · Female only
Enrollment
385 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Dec 4, 2024 · Synced Sep 4, 2026, 1:02 AM EDT
Recruiting Phase 1Phase 2 Interventional

Phase 1/2 Study of ETX-636 in Participants With Advanced Solid Tumors

NCT06993844
View directory record Official record
Conditions
Advanced Solid Tumors, Advanced Breast Cancer
Interventions
ETX-636 dose escalation, ETX-636 dose escalation in combination with fulvestrant, ETX-636 dose expansion in combination with fulvestrant
Drug
Lead sponsor
Ensem Therapeutics
Industry
Eligibility
18 Years and older
Enrollment
233 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
10
States / cities
Newport Beach, California • San Francisco, California • New Haven, Connecticut + 6 more
Source: ClinicalTrials.gov public record
Updated Jun 22, 2026 · Synced Sep 4, 2026, 1:02 AM EDT
Completed Phase 2 Interventional Results available

Transdermal Estrogen in Older Premenopausal Women With Anorexia Nervosa

NCT02475265
View directory record Official record
Conditions
Anorexia Nervosa, Osteoporosis
Interventions
estradiol 0.045 mg/levonorgestrel 0.015mg
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
25 Years to 50 Years · Female only
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 21, 2019 · Synced Sep 4, 2026, 1:02 AM EDT
Recruiting Phase 1 Interventional

Reversing InGuinal Hernia Trial: The Evaluation of Sex Hormones to Reverse Inguinal Hernias in Males

NCT07604272
View directory record Official record
Conditions
Inguinal Hernia Unilateral, Inguinal Hernia Bilateral, Inguinal Hernia Without Obstruction or Gangrene, Inguinal Hernia, Without Mention of Obstruction or Gangrene
Interventions
Fulvestrant, Anastrozole (ARIMIDEX™)
Drug
Lead sponsor
Northwestern University
Other
Eligibility
50 Years and older · Male only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 2, 2026 · Synced Sep 4, 2026, 1:02 AM EDT
Terminated Phase 2 Interventional

Letrozole and Goserelin or Leuprolide in Treating Premenopausal Estrogen Receptor-Positive Patients With Stage IV Breast Cancer

NCT00498901
View directory record Official record
Conditions
Breast Cancer
Interventions
goserelin, letrozole, leuprolide acetate, conventional surgery
Drug · Procedure
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older · Female only
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
2
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated May 8, 2013 · Synced Sep 4, 2026, 1:02 AM EDT
Active, not recruiting Phase 3 Interventional

Study of PF-07220060 With Letrozole in Adults With HR-positive HER2-negative Breast Cancer Who Have Not Received Anticancer Treatment for Advanced/Metastatic Disease

NCT06760637
View directory record Official record
Conditions
Breast Cancer
Interventions
PF-07220060, letrozole, abemaciclib, palbociclib, ribociclib
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
1,035 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2037
U.S. locations
218
States / cities
Birmingham, Alabama • Chandler, Arizona • Gilbert, Arizona + 135 more
Source: ClinicalTrials.gov public record
Updated May 18, 2026 · Synced Sep 4, 2026, 1:02 AM EDT
Completed Phase 2 Interventional Results available

Study of (1) Everolimus, (2) Estrogen Deprivation Therapy (EDT) With Leuprolide + Letrozole and (3) Everolimus + EDT in Patients With Unresectable Fibrolamellar Hepatocellular Carcinoma (FLL-HCC)

NCT01642186
View directory record Official record
Conditions
Fibrolamellar Carcinoma, Fibrolamellar Liver Cancer
Interventions
everolimus, letrozole plus leuprolide, combination of everolimus, letrozole and leuprolide
Drug
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
12 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2021
U.S. locations
6
States / cities
San Francisco, California • Baltimore, Maryland • Boston, Massachusetts + 1 more
Source: ClinicalTrials.gov public record
Updated Dec 28, 2022 · Synced Sep 4, 2026, 1:02 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Letrozole With or Without Zoledronate in Treating Healthy Postmenopausal Women With High Breast Density

NCT00114270
View directory record Official record
Conditions
Breast Cancer, Osteoporosis
Interventions
letrozole, zoledronic acid
Drug
Lead sponsor
University of Virginia
Other
Eligibility
18 Years and older · Female only
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2007
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 25, 2013 · Synced Sep 4, 2026, 1:02 AM EDT
Completed No phase listed Observational

Pharmacogenetics of Anastrozole in Postmenopausal Women With Estrogen Receptor-Positive and/or Progesterone Receptor-Positive Stage I, Stage II, or Stage III Breast Cancer

NCT00283608
View directory record Official record
Conditions
Breast Cancer
Interventions
Single nucleotide polymorphism (SNP), high performance liquid chromatography, measurements by DXA, questionnaire administration
Genetic · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older · Female only
Enrollment
1,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2010
U.S. locations
4
States / cities
Scottsdale, Arizona • Jacksonville, Florida • Rochester, Minnesota + 1 more
Source: ClinicalTrials.gov public record
Updated May 15, 2011 · Synced Sep 4, 2026, 1:02 AM EDT
Completed Phase 2 Interventional Results available

Neoadjuvant Endocrine Therapy in Hormone Receptor-Positive, Human Epidermal Growth Factor Receptor 2 (HER2)-Negative Node-Negative Breast Cancer

NCT03219476
View directory record Official record
Conditions
Breast Cancer, Invasive Breast Cancer
Interventions
Anastrozole, Letrozole, Exemestane, Tamoxifen
Drug
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Years and older · Female only
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2025
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Apr 28, 2025 · Synced Sep 4, 2026, 1:02 AM EDT
Completed No phase listed Observational

Estrogen Receptor Gene Mutations

NCT00342498
View directory record Official record
Conditions
Mutations, Hormones
Interventions
Not listed
Lead sponsor
National Institute of Environmental Health Sciences (NIEHS)
NIH
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
1994 – 2008
U.S. locations
2
States / cities
Research Triangle Park, North Carolina • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Sep 4, 2026, 1:02 AM EDT
Withdrawn Phase 1Phase 2 Interventional

A Rollover Protocol of Elacestrant, in Combination With Onapristone, for Patients With ER+, PR+, HER2- Advanced or Metastatic Breast Cancer

NCT06938711
View directory record Official record
Conditions
Breast Cancer
Interventions
Elacestrant, Onapristone
Drug
Lead sponsor
Context Therapeutics Inc.
Industry
Eligibility
18 Years and older · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 21, 2025 · Synced Sep 4, 2026, 1:02 AM EDT
Completed Phase 1Phase 2 Interventional

A Phase 1/2 Trial of ARV-471 Alone and in Combination With Palbociclib (IBRANCE®) in Patients With ER+/HER2- Locally Advanced or Metastatic Breast Cancer

NCT04072952
View directory record Official record
Conditions
Breast Cancer
Interventions
ARV-471, ARV-471 in combination with palbociclib (IBRANCE®)
Drug
Lead sponsor
Arvinas Estrogen Receptor, Inc.
Industry
Eligibility
18 Years and older
Enrollment
217 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2026
U.S. locations
16
States / cities
Palo Alto, California • San Francisco, California • Santa Monica, California + 12 more
Source: ClinicalTrials.gov public record
Updated Apr 14, 2026 · Synced Sep 4, 2026, 1:02 AM EDT
Completed Phase 2 Interventional Results available

F-18 16 Alpha-Fluoroestradiol-Labeled Positron Emission Tomography in Predicting Response to First-Line Hormone Therapy in Patients With Stage IV Breast Cancer

NCT00602043
View directory record Official record
Conditions
Estrogen Receptor-positive Breast Cancer, Progesterone Receptor-negative Breast Cancer, Progesterone Receptor-positive Breast Cancer, Recurrent Breast Cancer, Stage IV Breast Cancer
Interventions
F-18 16 alpha-fluoroestradiol, fludeoxyglucose F 18, positron emission tomography, computed tomography, laboratory biomarker analysis
Radiation · Procedure · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older · Female only
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Feb 18, 2020 · Synced Sep 4, 2026, 1:02 AM EDT