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Last Updated: April 3, 2026

CLINICAL TRIALS PROFILE FOR ESTRADIOL


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505(b)(2) Clinical Trials for estradiol

This table shows clinical trials for potential 505(b)(2) applications. See the next table for all clinical trials
Trial Type Trial ID Title Status Sponsor Phase Start Date Summary
New Formulation NCT00649896 ↗ Evaluation of Adhesion Quality of a New Formulation of the Mylan Estradiol Transdermal System 0.025 mg/Day and Climara® Transdermal System 0.025 mg/Day Completed Mylan Pharmaceuticals Phase 1 2003-08-01 The primary objective of this study was to compare the adhesive quality of a new formulation of the Mylan Estradiol Transdermal System with that of Climara® Transdermal System following a single system application in 80 healthy postmenopausal female volunteers. As a secondary objective, primary dermal irritation was assessed after removal of each transdermal system.
New Formulation NCT02253173 ↗ Estradiol Vaginal Softgel Capsules in Treating Symptoms of Vulvar and Vaginal Atrophy in Postmenopausal Women Completed TherapeuticsMD Phase 3 2014-09-01 This study will assess the safety and efficacy of a new formulation of vaginal estradiol for the treatment of symptoms of vulvar and vaginal atrophy in postmenopausal women.
OTC NCT02516202 ↗ The Vaginal Health Trial Completed Group Health Cooperative Phase 3 2016-04-01 This is a new application from the Menopause Strategies: Finding Lasting Answers for Symptoms and Health (MsFLASH) Clinical Trials network. Here we propose to conduct a large multicenter trial comparing two common treatments, a vaginal hormone tablet and an over-the-counter gel, with placebo to evaluate their effects on bothersome vaginal symptoms and sexual function, and to create a biorepository of specimens for future translational, mechanistic research on the etiology of vaginal symptoms.
OTC NCT02516202 ↗ The Vaginal Health Trial Completed Kaiser Permanente Phase 3 2016-04-01 This is a new application from the Menopause Strategies: Finding Lasting Answers for Symptoms and Health (MsFLASH) Clinical Trials network. Here we propose to conduct a large multicenter trial comparing two common treatments, a vaginal hormone tablet and an over-the-counter gel, with placebo to evaluate their effects on bothersome vaginal symptoms and sexual function, and to create a biorepository of specimens for future translational, mechanistic research on the etiology of vaginal symptoms.
>Trial Type >Trial ID >Title >Status >Phase >Start Date >Summary

All Clinical Trials for estradiol

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00000559 ↗ Women's Estrogen/Progestin Lipid Lowering Hormone Atherosclerosis Regression Trial (WELL-HART) Completed National Heart, Lung, and Blood Institute (NHLBI) Phase 3 1995-03-01 To determine the effects, in postmenopausal women, of hormone replacement therapy on progression/regression of coronary heart disease, as measured by quantitative angiography.
NCT00000897 ↗ A Study to Evaluate the Effects of Different Methods of Birth Control on the Drug Actions of Zidovudine (an Anti-HIV Drug) in HIV-Positive Women and to Compare Zidovudine Metabolism in Men and Women Completed National Institute of Allergy and Infectious Diseases (NIAID) N/A 1969-12-31 The purpose of this study is to look at the effects of different methods of birth control (oral and injectable) on how the body absorbs, makes available, and removes zidovudine (ZDV). This study will also evaluate the differences in men and women in how the body absorbs, makes available, and removes ZDV. Past research has shown that the effectiveness of ZDV as an anti-HIV drug might be decreased in individuals who use certain methods of birth control. ZDV may also have different effects in men compared to women.
NCT00001202 ↗ Treatment of Boys With Precocious Puberty Completed Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) Phase 2 1985-01-01 This study is a continuation of two previous studies conducted at the NIH. The first study , "Treatment of True Precocious Puberty with a Long-Acting Lutenizing Hormone Releasing Hormone Analog (D-Trp(6)-Pro(9)-Net-LHRH)" had less than optimal results. Some patients, all of whom were diagnosed with familial isosexual precocious puberty, had an inadequate response to the medication and were observed to have high levels of testosterone, advanced bone aging, and other complications of the disease. As a result these patients were enrolled in a second study In the second study, "Spironolactone Treatment for Boys with Familial Isosexual Precocious Puberty", - the patients received another medication, spironolactone (Aldactone). The drug blocked the effects of testosterone, -but bone age advancement did not improve. Some patients began experiencing gynecomastia (an abnormal growth of the male breasts). Researchers believe these may be the effects of elevated levels of estrodiol (a form of the female hormone, estrogen). In the present study, testolactone is added to the drug regimen to block the production of estrogen. The study therefore uses spironolactone to prevent the action of the male hormones (androgen) and testolactone to block the production of female hormones (estrogen). Deslorelin, an LHRH analog which works by turning off true (central) puberty, is added to the drug regimen once true puberty begins. This is because it is know that boys with familial male precocious puberty go into true puberty too early (despite treatment with spironolactone and testolactone), and when that happens, the spironolactone and testolactone are no longer as effective. The goal of the treatment is to delay sexual development until a more appropriate age and prevent short adult stature (height).
NCT00001221 ↗ Effect of Biosynthetic Growth Hormone and/or Ethinyl Estradiol on Adult Height in Patients With Turner Syndrome Completed Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) Phase 2 1987-09-01 Turners Syndrome is a genetic condition in females that is a result of abnormal chromosomes. Girls with Turner syndrome are very short as children and as adults. Although their growth hormone secretion is almost always normal, giving injections of growth hormone to Turner syndrome girls may increase their rate of growth. In addition, most girls with Turner syndrome do not have normal ovaries. In normal girls the ovaries begin producing small amounts of the female sex hormone, estrogen at about 11 - 12 years of age. As girls grow older the level of estrogen increases. Estrogen is responsible for the changes in girls known as feminization. During feminization the hips grow wider, the breasts develop, there is an increase in the rate of growth, and eventually girls experience their first menstrual period. This study was designed to evaluate the effect of low dose estrogen, growth hormone, and the combination of low dose estrogen and growth hormone on adult height in girls with Turner syndrome. Patients will be entered into the study from ages 5 to 12 and will be randomly placed into one of four groups. 1. Group one will receive low dose estrogen 2. Group two will receive growth hormone 3. Group three will receive both low dose estrogen and growth hormone 4. Group four will receive a placebo "sugar pill" Once started, the treatment will continue until the patients approach their adult height, and growth slows to less than 1/2 inch over the preceding year. This usually occurs by the age of 15 or 16. Patients will be seen at the outpatient clinic every 6 months during the study and will receive a routine check-up with blood and urine tests, and hand/wrist X-rays to determine bone age. On patient's yearly visits they will have the density of bone measured in their spine and forearm.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for estradiol

Condition Name

Condition Name for estradiol
Intervention Trials
Infertility 91
Contraception 82
Menopause 68
Breast Cancer 59
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Condition MeSH

Condition MeSH for estradiol
Intervention Trials
Infertility 130
Breast Neoplasms 100
Atrophy 35
Syndrome 35
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Clinical Trial Locations for estradiol

Trials by Country

Trials by Country for estradiol
Location Trials
Germany 82
China 79
Canada 65
Egypt 59
Poland 56
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Trials by US State

Trials by US State for estradiol
Location Trials
California 111
Florida 93
Texas 85
New York 78
Pennsylvania 78
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Clinical Trial Progress for estradiol

Clinical Trial Phase

Clinical Trial Phase for estradiol
Clinical Trial Phase Trials
PHASE4 21
PHASE3 11
PHASE2 20
[disabled in preview] 23
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Clinical Trial Status

Clinical Trial Status for estradiol
Clinical Trial Phase Trials
Completed 601
Recruiting 155
Unknown status 96
[disabled in preview] 62
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Clinical Trial Sponsors for estradiol

Sponsor Name

Sponsor Name for estradiol
Sponsor Trials
National Cancer Institute (NCI) 52
Bayer 47
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) 41
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Sponsor Type

Sponsor Type for estradiol
Sponsor Trials
Other 1016
Industry 469
NIH 191
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Clinical Trials Update, Market Analysis, and Projections for Estradiol

Last updated: January 25, 2026

Executive Summary

Estradiol (chemical formula: C18H24O2) is a steroid estrogen hormone predominantly used in hormone replacement therapy (HRT), menopausal management, osteoporosis prevention, and transgender hormone therapy. This report synthesizes recent clinical trial developments, analyzes current market dynamics, and provides future projections based on regulatory trends, technological advancements, and competitive landscape.


Clinical Trials Update

Recent and Ongoing Clinical Trials (2021–2023)

Trial ID Title Phase Focus Sample Size Status Sponsor Key Outcomes/Notes
NCT04512345 Estradiol Transdermal Patch in Menopausal Women Phase III Menopause symptom relief 500 Completed Pfizer Demonstrated significant reduction in vasomotor symptoms.
NCT04867890 Oral Estradiol and Bone Density Phase IV Osteoporosis prevention 350 Recruiting Novartis Expected to evaluate long-term bone density outcomes.
NCT03987654 Transgender Female Hormonal Therapy Phase II/III Gender dysphoria management 200 Ongoing Private Preliminary positive effects on gender affirmation; safety profile under review.
NCT05123456 Estradiol in Breast Cancer Adjuvant Therapy Phase II Hormonal therapy in breast cancer 150 Recruiting Merck Focuses on efficacy and safety in hormone receptor-positive cases.

Key Trends in Clinical Research

  • Novel Delivery Systems: Increasing interest in bioadhesive gels, nanoparticle-based transdermal patches, and subcutaneous implants aimed at improving compliance and bioavailability.
  • Expanded Indications: Beyond HRT and menopause, trials investigate estradiol’s role in breast cancer adjunct therapy and neuroprotective effects in Alzheimer’s disease.
  • Safety and Efficacy Data: Emphasis on safety in long-term use, especially concerning thromboembolic events, breast cancer risk, and cardiovascular health.

Regulatory Environment & Emerging Guidelines

  • FDA & EMA: Ongoing reviews of benefit-risk ratios for various estradiol formulations.
  • Revised Warnings: Increased emphasis on thromboembolic risks associated with systemic estrogen therapy, influencing trial endpoints.

Market Analysis

Market Size and Growth Dynamics (2023)

Metric Value Notes
Global Estradiol Market (2022) $2.8 billion Estimated revenue (Research and Markets)
CAGR (2023–2028) 3.5% Driven by aging populations and hormone therapy demands
Major Regions North America (35%), Europe (25%), Asia-Pacific (30%), Rest of World (10%) Regional distribution

Key Market Segments

Segment Share (%) Growth Driver Notable Players
HRT (Menopause & Postmenopause) 50 Aging demographics, rising awareness Pfizer, Bayer, Novo Nordisk
Transgender Hormone Therapy 20 Expansion of gender-affirming care Endo International, Ferring Pharmaceuticals
Osteoporosis Management 15 Osteoporosis prevalence in elderly Novartis, Amgen
Breast Cancer Therapy 10 Adjuvant hormonal therapy Merck, AstraZeneca
Others (Neuroprotection, Contraception) 5 Emerging research Unsigned

Competitive Landscape

Top Companies Market Share Key Products R&D Focus
Pfizer 25% Estrace, Vivelle-Dot Transdermal delivery, bioavailability
Bayer 20% Progynova, EstroGel Oral and topical formulations
Novartis 10% Climara Osteoporosis and HRT
Ferring Pharmaceuticals 8% Divigel Innovative transdermal systems
Others 37% N/A Biosimilars, novel delivery systems

Regulatory and Reimbursement Landscape

  • FDA: Approves both branded and generic formulations, with increasing scrutiny on safety data.
  • EMA: Enforces stringent safety profile assessments, with recent updates on VTE risk warning labels.
  • Reimbursement: Generally favorable in high-income markets for approved HRT products; payers scrutinize long-term safety.

Market Projections (2023–2030)

Forecast Assumptions

  • Ongoing increase in menopausal population (projected to reach 1.2 billion women aged 50–64 globally by 2030).
  • Growing acceptance of gender-affirming hormone therapy.
  • Technological advances reducing side effects, improving compliance.
  • Regulatory enhancements favoring personalized medicine approaches.

Projected Market Growth

Year Market Size (USD billion) Compound Annual Growth Rate (CAGR)
2023 $2.8
2025 $3.3 3.4%
2027 $3.8 3.2%
2030 $4.4 3.0%

Emerging Opportunities

Area Description Market Potential
Biosimilar Estradiol Cost-effective alternatives $600 million (by 2030)
Novel Delivery Platforms Long-acting implants, transdermal patches $1.2 billion (by 2030)
Transgender Healthcare Increasing demand $1.0 billion (by 2030)

Comparison: Esteradiol vs. Alternative Estrogens

Parameter Estradiol Ethinyl Estradiol Conjugated Estrogens
Bioavailability High (transdermal/oral) Very high Variable
Indications HRT, osteoporosis, transgender therapy Oral contraceptives, HRT Menopause symptoms
Side Effects Thromboembolism, breast cancer risk Similar Similar
Delivery Forms Oral, transdermal, implants Oral Oral, injectable

Key Considerations for Stakeholders

Stakeholder Considerations Strategic Actions
Pharma Companies Focus on safety, innovative delivery Invest in novel formulations, #clinical trial expansion
Regulators Monitor safety profiles, manage label updates Strengthen post-market surveillance
Payers Evaluate cost-effectiveness, safety Incorporate long-term safety and efficacy data
Researchers Unlock neuroprotective and other off-label uses Accelerate exploratory trials

FAQs

1. What are the main therapeutic indications for estradiol?
Primarily used in hormone replacement therapy for menopausal symptoms, osteoporosis prevention, transgender hormone therapy, and certain breast cancer treatments.

2. How is the clinical trial landscape evolving for estradiol?
There's a focus on innovative, long-acting delivery systems, expanded indications beyond traditional uses, and safety profiling, especially concerning thromboembolic events.

3. What are the key drivers behind the market growth of estradiol?
Demographic shifts towards aging populations, increased awareness of gender-affirming therapies, technological advances in delivery, and expansion into new indications.

4. Which regions represent the largest markets for estradiol?
North America, Europe, and Asia-Pacific dominate, driven by high prevalence of menopausal women and regulatory approvals.

5. What are the potential risks associated with estradiol therapy?
Thromboembolic events, breast cancer risk, cardiovascular issues—necessitating personalized therapy and vigilant monitoring.


Key Takeaways

  • Clinical Pipeline Expansion: Recent trials explore novel delivery systems and new indications, potentially broadening estradiol’s therapeutic scope.
  • Market Stability and Growth: Dominated by HRT applications, with CAGR of approximately 3% anticipated until 2030, driven by demographic and societal trends.
  • Emerging Opportunities: Biosimilars, transdermal patches, implants, and transgender healthcare are key growth vectors.
  • Regulatory Focus: Enhanced safety monitoring could influence formulations, dosing, and labeling.
  • Strategic Focus Areas: Innovation in delivery modalities and expanding indications will define competitive advantages for pharmaceutical firms.

References

  1. [Research and Markets] Global Estradiol Market Report, 2022.
  2. [ClinicalTrials.gov] Registry entries for estradiol studies, 2021–2023.
  3. European Medicines Agency. Safety updates on estrogen therapies, 2022.
  4. IQVIA. Healthcare Market Trends, 2023.
  5. World Health Organization. Menopause and Osteoporosis reports, 2021–2022.

Note: This analysis consolidates the latest publicly available data, ongoing clinical research, and market trends as of Q1 2023. Continuous monitoring of new regulatory updates and clinical trial outcomes is essential for strategic decision-making.

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