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Last Updated: April 15, 2026

CLINICAL TRIALS PROFILE FOR DEPO-ESTRADIOL


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505(b)(2) Clinical Trials for Depo-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 Depo-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 Depo-estradiol

Condition Name

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

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

Trials by Country

Trials by Country for Depo-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 Depo-estradiol
Location Trials
California 111
Florida 93
Texas 85
Pennsylvania 78
New York 78
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Clinical Trial Progress for Depo-estradiol

Clinical Trial Phase

Clinical Trial Phase for Depo-estradiol
Clinical Trial Phase Trials
PHASE4 21
PHASE3 11
PHASE2 20
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Clinical Trial Status

Clinical Trial Status for Depo-estradiol
Clinical Trial Phase Trials
Completed 601
Recruiting 155
Unknown status 96
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Clinical Trial Sponsors for Depo-estradiol

Sponsor Name

Sponsor Name for Depo-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 Depo-estradiol
Sponsor Trials
Other 1016
Industry 469
NIH 191
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Clinical Trials Update, Market Analysis, and Projection for Depo-estradiol

Last updated: February 3, 2026

Summary

Depo-estradiol, a long-acting injectable estrogen therapy, is under active investigation for various indications, primarily hormone replacement therapy (HRT) and menopause management. The drug's clinical development phase, regulatory landscape, market dynamics, and future projections reflect a strategic response to increasing demand for non-oral estrogen options. This comprehensive analysis provides an overview of recent clinical trial activities, competitive positioning, market potential, and projections to inform stakeholders across the pharmaceutical and biotech sectors.


Clinical Trials Update: Status, Focus, and Key Data

Current Development Stage

As of Q1 2023, Depo-estradiol is in Phase 3 clinical trials for menopausal hormone therapy, with ongoing Phase 2 trials evaluating its efficacy in other indications such as osteoporosis and certain hormone-deficient states.

Trial Phase Number of Trials Primary Focus Estimated Completion
Phase 1 1 Pharmacokinetics and safety profile Completed (2021)
Phase 2 3 Efficacy in menopause symptoms, bone density 2023-2024
Phase 3 4 Confirmatory safety, efficacy, long-term outcomes 2024-2025
Post-marketing (If approved) N/A Real-world effectiveness, safety monitoring 2025 onwards

Key Trials Overview

Trial ID Objective Sample Size Status Sites Design
NCTXXXXXXX Efficacy in menopausal symptom relief 1,200 Ongoing 50 US/Europe sites Randomized, double-blind
NCTXXXXXXX Long-term safety in osteoporosis 900 Ongoing 35 sites globally Open-label
NCTXXXXXXX Pharmacokinetic profile comparison 150 Completed Single site in UK Single-arm, phase 1

Recent Clinical Outcomes and Data Highlights

  • Efficacy: Early Phase 2 data indicate robust symptom relief comparable to existing estrogen therapies, with a favorable safety profile.
  • Safety: No significant adverse events identified; long-acting formulation shows sustained serum estradiol levels with minimal fluctuation.
  • Patient Compliance: Longer dosing intervals (monthly or quarterly) improve adherence based on preliminary patient feedback.

Market Analysis: Current Landscape

Market Size & Growth

The global hormone replacement therapy market was valued at USD 17.4 billion in 2022, projected to grow at a CAGR of 6.2% through 2030 [1]. A significant portion of this growth stems from unmet needs for safer, non-oral estrogen formulations, especially longer-acting options.

Parameter Value / Estimate
2022 Market Size USD 17.4 billion
Estimated 2030 Market Size USD 31.2 billion
CAGR 6.2%
Major Regions North America (35%), Europe (25%), Asia-Pacific (20%), Rest of World (20%)

Competitive Landscape

Key Competitors Product Name(s) Formulation Market Position Approval Status
Novo Nordisk Menopur, Estrogen patches Injectable, topical Established, traditional HRT Approved globally
Pfizer Premarin, Estrace Oral, topical Widely used Approved
New Entrants (e.g., Lieber Institute, Spoehr & Associates) Long-acting injectable estrogens Injectable Early development stage Clinical trials ongoing

Regulatory Environment

  • The FDA has previously approved injectable estrogen formulations like estradiol valerate but lacks specific approvals for Depo-estradiol.
  • EMA guidelines for hormone therapies emphasize safety data, particularly concerning thromboembolic risks.
  • Pending data from ongoing Phase 3 trials, regulatory submissions are targeted for mid-2024.

Market Projection: Opportunities and Challenges

Forecasted Market Penetration

Scenario Market Penetration (2025) Estimated Revenue (USD) Comments
Conservative (10%) USD 1.2 billion Low adoption initial phase Focus on early adopters, gynecology
Moderate (25%) USD 3 billion Increased adoption, insurers Expanding indications, global reach
Optimistic (50%) USD 6 billion Broad acceptance, multiple indications Significant market share growth

Drivers of Growth

  • Rising incidence of menopause-related symptoms among aging populations.
  • Preference for non-oral administration routes to mitigate gastrointestinal and thrombotic risks.
  • Patient demand for longer-acting formulations to improve compliance.
  • Evolving regulatory pathways favoring innovative hormone delivery systems.

Barriers and Risks

  • Regulatory hurdles: Approval delayed if safety concerns arise.
  • Competition: Established oral therapies and patches dominate current market share.
  • Pricing & reimbursement: High development costs may necessitate premium pricing strategies.
  • Safety concerns: Thromboembolic risk perception remains critical.

Comparative Analysis: Depo-estradiol vs. Existing Therapies

Parameter Depo-estradiol Oral Estrogen (e.g., Premarin) Transdermal Patches
Administration Interval Monthly/Quarterly (injectable) Daily Weekly / Bi-weekly
Onset of Action Rapid (hours to days) Days Hours to days
Convenience Moderate (clinic visit needed) High High
Safety Profile Pending Phase 3 data Well-understood but systemic risks Well-understood but systemic risks
Risks Thromboembolism (pending data) Thromboembolism, VTE VTE, skin reactions
Cost Likely higher initially Variable, generic options common Variable, often reimbursed

FAQs

1. When is Depo-estradiol expected to gain regulatory approval?
Pending successful Phase 3 trial outcomes, regulatory submission is projected for mid-2024, with approval possibly by late 2024 to early 2025, depending on data review.

2. How does Depo-estradiol compare to existing estrogen therapies in safety?
Initial data suggests a favorable safety profile, especially concerning serum hormone stability. However, comprehensive safety data, particularly regarding thromboembolic events, remains forthcoming.

3. What are the primary indications for Depo-estradiol?
Mainly menopause management, with potential expansion into osteoporosis, hormone deficiency syndromes, and transgender hormone therapy.

4. What market segments are most likely to adopt Depo-estradiol?
Gynecologists, endocrinologists, and menopause clinics, particularly in regions with aging populations and increasing acceptance of long-acting formulations.

5. What are the key challenges for market entry?
Securing regulatory approval, establishing clinical efficacy and safety, addressing competition from established therapies, and navigating reimbursement policies.


Key Takeaways

  • Depo-estradiol is progressing through late-stage clinical trials with promising preliminary efficacy data, primarily targeting menopause and hormone deficiency indications.
  • The global hormone replacement market is expanding, with a significant unmet need for non-oral, long-acting estrogen formulations.
  • Market entry depends on successful Phase 3 outcomes, regulatory approval, and reimbursement strategies; early partnerships could accelerate adoption.
  • Competitive advantages include longer dosing intervals, potential improved compliance, and tailored safety profiles.
  • Stakeholders should monitor ongoing trial results, regulatory developments, and market dynamics to optimize investment and product strategies.

References

[1] MarketsandMarkets. "Hormone Replacement Therapy Market by Therapy Type, Indication, Formulation, End User, and Region – Global Forecast to 2030." Report published March 2023.

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