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Showing 1–24 of 70 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Estrogen Replacement Therapy Clear all
Not listed Phase 4 Interventional Accepts healthy volunteers

Kronos Early Estrogen Prevention Study (KEEPS)

NCT00154180
View directory record Official record
Conditions
Menopause, Arteriosclerosis
Interventions
Conjugated equine estrogens 0.45 mg/day, Transdermal estradiol, 50 mcg/day, Micronized progesterone, 200 mg/day x 12 d/month, CEE , progesterone, estradiol patch or placebo for each, CEE, progesterone, transdermal patch or the placebo
Drug
Lead sponsor
Kronos Longevity Research Institute
Other
Eligibility
42 Years to 58 Years · Female only
Enrollment
728 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2012
U.S. locations
9
States / cities
Phoenix, Arizona • San Francisco, California • New Haven, Connecticut + 6 more
Source: ClinicalTrials.gov public record
Updated Sep 13, 2009 · Synced Sep 5, 2026, 10:52 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Estrogen for Treating Depression in Menopausal Women With Hot Flashes and Insomnia

NCT00227942
View directory record Official record
Conditions
Sleep Initiation and Maintenance Disorders, Depression
Interventions
Estrogen Replacement Therapy, Zolpidem, placebo
Drug
Lead sponsor
Hadine Joffe, MD
Other
Eligibility
40 Years to 60 Years · Female only
Enrollment
86 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2007
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 25, 2014 · Synced Sep 5, 2026, 10:52 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

The Effect of Sex Steroid Replacement Therapy in the Hypogonadism and Transgender Active-Duty Population

NCT06247267
View directory record Official record
Conditions
Hypogonadism, Gender Identity Dysphoria
Interventions
Fortesta, Estradiol
Drug
Lead sponsor
Walter Reed National Military Medical Center
Federal
Eligibility
18 Years to 65 Years
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 28, 2025 · Synced Sep 5, 2026, 10:52 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Relationship Between the Menstrual Cycle and Heart Disease in Women

NCT01546454
View directory record Official record
Conditions
Coronary Heart Disease
Interventions
Ethinyl Estradiol-Levonorgestrel combination, leuprolide acetate, Estradiol, Progesterone
Drug
Lead sponsor
Oregon Health and Science University
Other
Eligibility
21 Years to 40 Years · Female only
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Mar 21, 2017 · Synced Sep 5, 2026, 10:52 AM EDT
Completed Phase 2 Interventional

Effects of Hormone Replacement Therapy on Inflammation and Stiffening of Artery Walls

NCT00005108
View directory record Official record
Conditions
Atherosclerosis, Healthy, Vascular Disease
Interventions
Estradiol, Progesterone
Drug
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
Female only
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2002
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 5, 2026, 10:52 AM EDT
Completed Phase 2 Interventional Results available

Clomiphene Citrate for the Treatment of Low Testosterone Associated With Chronic Opioid Pain Medication Administration

NCT01880086
View directory record Official record
Conditions
Hypogonadism, Opioid-Related Disorders, Male Infertility
Interventions
Clomiphene citrate, Placebo
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years to 65 Years · Male only
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 16, 2018 · Synced Sep 5, 2026, 10:52 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

ELITE: Early Versus Late Intervention Trial With Estradiol

NCT00114517
View directory record Official record
Conditions
Atherosclerosis
Interventions
17B-estradiol, Placebo
Drug · Other
Lead sponsor
University of Southern California
Other
Eligibility
Female only
Enrollment
643 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2013
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 17, 2023 · Synced Sep 5, 2026, 10:52 AM EDT
Not yet recruiting No phase listed Observational

An Observational Study to Learn How Mirena and Other Progestogen Treatments Are Used for Endometrial Protection in Women 40+ With a Uterus in the United States Receiving Estrogen Therapy, and Their Respective Health Outcomes

NCT07795606
View directory record Official record
Conditions
Estrogen Therapy
Interventions
Estrogen therapy, Mirena levonorgestrel-releasing intrauterine system, Other progestogen therapy
Drug · Device
Lead sponsor
Bayer
Industry
Eligibility
40 Years and older · Female only
Enrollment
456,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
2
States / cities
Ann Arbor, Michigan • Eden Prairie, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 30, 2026 · Synced Sep 5, 2026, 10:52 AM EDT
Completed Phase 3 Interventional Results available

Hormone Replacement Therapy for Use in Postmenopausal Women for Relief of Hot Flushes and Urogenital Symptoms.

NCT01070979
View directory record Official record
Conditions
Hormone Replacement Therapy
Interventions
Estradiol acetate, Estradiol, Conjugated equine estrogens
Drug
Lead sponsor
Warner Chilcott
Industry
Eligibility
35 Years and older · Female only
Enrollment
249 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003
U.S. locations
32
States / cities
Phoenix, Arizona • Carmichael, California • San Diego, California + 28 more
Source: ClinicalTrials.gov public record
Updated Apr 21, 2013 · Synced Sep 5, 2026, 10:52 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Perimenopausal Effects of Estradiol on Reward Responsiveness

NCT02255175
View directory record Official record
Conditions
Perimenopausal Depression
Interventions
Estradiol, Progesterone
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
44 Years to 55 Years · Female only
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2018
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 11, 2019 · Synced Sep 5, 2026, 10:52 AM EDT
Completed Phase 3 Interventional Results available

A Trial to Compare the Efficacy and Safety of Once-weekly Lonapegsomatropin With Placebo and a Daily Somatropin Product in Adults With Growth Hormone Deficiency

NCT04615273
View directory record Official record
Conditions
Growth Hormone Deficiency, Endocrine System Diseases, Hormone Deficiency
Interventions
Lonapegsomatropin, Placebo, Somatropin
Drug · Other
Lead sponsor
Ascendis Pharma Endocrinology Division A/S
Industry
Eligibility
23 Years to 80 Years
Enrollment
264 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
23
States / cities
Birmingham, Alabama • Phoenix, Arizona • Fresno, California + 18 more
Source: ClinicalTrials.gov public record
Updated Jul 6, 2026 · Synced Sep 5, 2026, 10:52 AM EDT
Completed Phase 3 Interventional

Heart and Estrogen-Progestin Replacement Study (HERS)

NCT00319566
View directory record Official record
Conditions
Coronary Heart Disease
Interventions
Premarin .625 mg daily plus medroxyprogesterone 2.5 mg daily
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
55 Years to 75 Years · Female only
Enrollment
2,430 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1992 – 2001
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Apr 26, 2006 · Synced Sep 5, 2026, 10:52 AM EDT
Completed No phase listed Observational

The Effects of Estrogen Withdrawal on Mood Symptoms in Women

NCT00060736
View directory record Official record
Conditions
Perimenopausal Depression, Post Menopausal, Healthy, Depression
Interventions
Not listed
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
45 Years to 65 Years · Female only
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2016
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 15, 2019 · Synced Sep 5, 2026, 10:52 AM EDT
Withdrawn Phase 2 Interventional

Trifecta Research Study

NCT06810765
View directory record Official record
Conditions
PTSD - Post Traumatic Stress Disorder, Cognitive Dysfunction, Brain Trauma, Brain Injuries
Interventions
Hormone Replacement Therapy (HRT), Magnetic Resonance Therapy (MeRT), ibogaine with magnesium treatment, 5-MeO-DMT
Other · Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 21, 2025 · Synced Sep 5, 2026, 10:52 AM EDT
Withdrawn Phase 2 Interventional

Effects of an Estrogen Replacement Therapy Skin Patch on Ovulation in Women With Premature Ovarian Failure

NCT00370019
View directory record Official record
Conditions
Premature Ovarian Failure
Interventions
Estradiol/Medroxyprogesterone acetate
Drug
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
18 Years to 40 Years · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2011
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Sep 5, 2026, 10:52 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Regulation of Cervical Mucus Secretion

NCT02969590
View directory record Official record
Conditions
Fertility, Contraception
Interventions
Leuprolide acetate, Estrogen and Progesterone Replacement, Progestin
Drug
Lead sponsor
Oregon Health and Science University
Other
Eligibility
21 Years to 40 Years · Female only
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Oct 17, 2019 · Synced Sep 5, 2026, 10:52 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Transgender Estradiol Affirming Therapy

NCT05010707
View directory record Official record
Conditions
Transgenderism
Interventions
Transdermal patch, Pro-thrombotic markers, Metabolic markers, Hormone Profile, Daily Sublingual Tablet, BID Sublingual Tablet, Spironolactone
Drug · Diagnostic Test
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 30 Years · Male only
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Nov 25, 2024 · Synced Sep 5, 2026, 10:52 AM EDT
Completed Not applicable Interventional

IVF Clinical Trial of Two Different Treatment Protocols.

NCT00799929
View directory record Official record
Conditions
Infertility
Interventions
in vitro fertilization (IVF/ICSI)
Other
Lead sponsor
New Hope Fertility Center
Other
Eligibility
18 Years to 38 Years · Female only
Enrollment
564 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 23, 2015 · Synced Sep 5, 2026, 10:52 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Continuation of The Kronos Early Estrogen Prevention Study (KEEPS)

NCT03718494
View directory record Official record
Conditions
Alzheimer Dementia
Interventions
Brain Magnetic Resonance Imaging (MRI), F-18 Florbetapir Positron Emission Tomography (PET) Imaging, F-18 AV-1451 Positron Emission Tomography (PET) Imaging, Neuropsychological Testing
Diagnostic Test · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
49 Years to 72 Years · Female only
Enrollment
299 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
6
States / cities
Phoenix, Arizona • San Francisco, California • New Haven, Connecticut + 3 more
Source: ClinicalTrials.gov public record
Updated Jul 16, 2023 · Synced Sep 5, 2026, 10:52 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Human Requirements for the Nutrient Choline

NCT00065546
View directory record Official record
Conditions
Postmenopausal Women
Interventions
Estrogen plus choline depletion diet, Placebo plus choline depletion diet, Pre-menopausal women with SNPs given a low choline diet
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 85 Years · Female only
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2012
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 5, 2012 · Synced Sep 5, 2026, 10:52 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Estrogen Use in Protection From Cognitive Decline

NCT00097058
View directory record Official record
Conditions
Aging, Menopause
Interventions
Not listed
Lead sponsor
Stanford University
Other
Eligibility
45 Years to 65 Years · Female only
Enrollment
71 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2014
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Nov 18, 2014 · Synced Sep 5, 2026, 10:52 AM EDT
Completed Phase 2 Interventional

Comparison of Estrogen and Methyltestosterone Combination Treatments for Postmenopausal Hot Flushes

NCT00160342
View directory record Official record
Conditions
Hot Flushes, Menopause, Postmenopause
Interventions
Esterified Estrogens (EE) and Methyltestosterone (MT)
Drug
Lead sponsor
Solvay Pharmaceuticals
Industry
Eligibility
45 Years to 65 Years · Female only
Enrollment
1,251 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
88
States / cities
Montgomery, Alabama • Tucson, Arizona • Jonesboro, Arkansas + 69 more
Source: ClinicalTrials.gov public record
Updated Aug 14, 2008 · Synced Sep 5, 2026, 10:52 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

Perimenopausal Estrogen Replacement Therapy Study

NCT01308814
View directory record Official record
Conditions
Perimenopause, Menopause, Depression
Interventions
Estradiol, Placebo
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
45 Years to 60 Years · Female only
Enrollment
172 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2016
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 21, 2017 · Synced Sep 5, 2026, 10:52 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Oophorectomy, Estrogen Therapy and Cardiovascular Disease Risk in Young Women

NCT03815929
View directory record Official record
Conditions
Cardiovascular Risk Reduction
Interventions
Estradiol 100 Micrograms Patch, Estradiol Patch
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
21 Years to 45 Years · Female only
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 22, 2024 · Synced Sep 5, 2026, 10:52 AM EDT