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Last Updated: December 18, 2025

CLINICAL TRIALS PROFILE FOR LEVONORGESTREL


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All Clinical Trials for levonorgestrel

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00064766 ↗ Norplant and Irregular Bleeding/Spotting Unknown status Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) Phase 4 2003-02-01 Irregular or prolonged menstrual bleeding and/or spotting are common side effects in patients using progestin-only hormonal contraception such as levonorgestrel implants (Norplant). Doxycycline, a drug approved by the Food and Drug Administration (FDA) to treat gum disease, may reduce the occurrence of uterine bleeding and spotting in women who use Norplant. This study will evaluate the effects of doxycycline on uterine bleeding/spotting in women using Norplant.
NCT00117273 ↗ A Study to Evaluate Suppression of the Pituitary-Ovarian Axis With Three Different Oral Contraceptive Regimens Completed Duramed Research Phase 3 2005-06-01 This is a randomized, open-label study to evaluate pituitary ovarian suppression in healthy, reproductive-aged women using three different regimens of oral contraceptives (OCs). Two extended regimen OCs, Seasonale (levonorgestrel/ethinyl estradiol 0.15/0.03 mg for 84 days followed by 7 days of placebo), and Seasonique (levonorgestrel/ethinyl estradiol 0.15/0.03 mg for 84 days followed by 7 days of ethinyl estradiol 0.01 mg), and a 28-day regimen OC, Portia (levonorgestrel/ethinyl estradiol 0.15/0.03 mg for 21 days followed by 7 days of placebo).
NCT00128934 ↗ Study Evaluating Combination of Levonorgestrel (LNG) and Ethinyl Estradiol (EE) in Premenstrual Dysphoric Disorder Completed Wyeth is now a wholly owned subsidiary of Pfizer Phase 3 2005-08-01 The purpose of this study is to determine whether levonorgestrel (LNG)/ethinyl estradiol (EE) is effective in treating the symptoms of severe premenstrual syndrome (PMS).
NCT00131885 ↗ Effects of St. John's Wort on the Oral Contraceptive Hormone Levonorgestrel Completed National Center for Complementary and Integrative Health (NCCIH) Phase 4 2005-08-01 This study will determine the effects of St. John's wort, a common herbal remedy, on metabolism of the female contraceptive hormone levonorgestrel.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for levonorgestrel

Condition Name

Condition Name for levonorgestrel
Intervention Trials
Contraception 81
Healthy 21
HIV 11
Endometriosis 10
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Condition MeSH

Condition MeSH for levonorgestrel
Intervention Trials
Emergencies 18
Hemorrhage 18
Hyperplasia 15
Endometrial Hyperplasia 14
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Clinical Trial Locations for levonorgestrel

Trials by Country

Trials by Country for levonorgestrel
Location Trials
United States 458
Germany 65
Canada 31
China 24
Japan 19
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Trials by US State

Trials by US State for levonorgestrel
Location Trials
Pennsylvania 25
California 25
Florida 24
Colorado 23
Ohio 22
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Clinical Trial Progress for levonorgestrel

Clinical Trial Phase

Clinical Trial Phase for levonorgestrel
Clinical Trial Phase Trials
PHASE3 1
PHASE2 5
PHASE1 12
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Clinical Trial Status

Clinical Trial Status for levonorgestrel
Clinical Trial Phase Trials
Completed 174
Recruiting 33
Not yet recruiting 24
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Clinical Trial Sponsors for levonorgestrel

Sponsor Name

Sponsor Name for levonorgestrel
Sponsor Trials
Bayer 40
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) 18
Novo Nordisk A/S 9
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Sponsor Type

Sponsor Type for levonorgestrel
Sponsor Trials
Other 247
Industry 146
NIH 36
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Levonorgestrel: Clinical Trials Update, Market Analysis, and Future Projections

Last updated: October 28, 2025

Introduction

Levonorgestrel, a synthetic progestogen widely used for contraception and emergency birth control, remains a cornerstone in reproductive health. As the regulatory landscape evolves and new formulations enter the market, comprehensive insights into clinical trials, market dynamics, and future growth prospects are vital for healthcare stakeholders and industry investors. This report provides an in-depth update on ongoing clinical assessments, analyzes current market conditions, and projects future industry trajectories for levonorgestrel-based products.

Clinical Trials Landscape for Levonorgestrel

Recent Clinical Trials and Investigations

Over the past twelve months, multiple clinical trials have explored new formulations, delivery mechanisms, and expanded indications for levonorgestrel, reflecting ongoing innovation and regulatory focus on safety and efficacy.

Long-acting Reversible Contraceptives (LARCs):
Recent Phase III studies assess the safety profiles and patient compliance of levonorgestrel-releasing intrauterine systems (LNG-IUS). These trials aim to demonstrate not only long-term contraceptive efficacy but also reductions in adverse effects, such as menstrual irregularities. For instance, a multicenter trial evaluating a new LNG-IUS with a 7-year duration showed comparable efficacy to existing devices, with a notable decrease in discontinuation rates due to side effects [1].

Emergency Contraception (EC):
Enhanced formulations of levonorgestrel for EC are under evaluation in Phase II studies, focusing on increasing absorption rates and reducing side effects. A recent trial involving a high-dose levonorgestrel pill combined with antiemetics indicated improved tolerability, potentially expanding its window for effective use up to 120 hours post-unprotected intercourse [2].

Novel Delivery Systems:
Innovations such as biodegradable implants and nanoparticle encapsulation aim to improve sustained release, reduce systemic side effects, and enhance compliance. An ongoing Phase I trial investigates a subdermal levonorgestrel implant with a targeted 5-year duration, showing promising pharmacokinetic profiles [3].

Regulatory and Safety Assessments

Regulatory agencies have intensified assessments of levonorgestrel-related products. Notably, the FDA completed a safety review of LNG-IUS devices, reaffirming their safety profile but emphasizing the need for clear patient counseling regarding potential risks like uterine perforation and hormonal side effects [4]. Similarly, the European Medicines Agency (EMA) is evaluating post-marketing data to update labeling concerning rare thromboembolic events associated with levonorgestrel-based hormonal contraceptives.

Future Trial Directions

Emerging trials are likely to focus on drug combinations for reversible contraception that incorporate levonorgestrel with other hormonal or non-hormonal agents, aiming to improve efficacy and reduce side effects. Additionally, research into user-controlled delivery systems, including patches and ring formulations, is gaining momentum [5].

Market Analysis of Levonorgestrel Products

Current Market Overview

The global levonorgestrel market is valued at approximately USD 2.1 billion as of 2023, driven primarily by demand for injectable contraceptives, intrauterine systems, and emergency contraceptives. The market exhibits a compound annual growth rate (CAGR) of around 6.2% over the past five years, reflecting rising global awareness and improving healthcare access [6].

Segment Breakdown:

  • Intrauterine Devices (IUDs): Dominates with over 55% market share, led by products like Mirena and Jaydess. Innovator companies continue to expand indications, including non-contraceptive benefits such as managing heavy menstrual bleeding.
  • Oral Emergency Contraceptives: Account for roughly 25%, with over-the-counter availability in several markets accelerating growth.
  • Injectable and Implants: Comprise about 20%, with annual growth rates exceeding 7%, fueled by increasing acceptance of long-acting reversible contraceptives (LARCs).

Geographical Dynamics:
North America and Europe dominate due to established healthcare infrastructure and regulatory approvals, but Asia-Pacific is emerging rapidly. Countries like India, China, and Indonesia exhibit increased demand owing to population growth and expanding awareness of contraceptive options [7].

Patent Landscape and Market Players

Major players include Bayer AG, Merck & Co., Teva Pharmaceuticals, and HRA Pharma. Patent expirations over the next five years are expected to open opportunities for generic manufacturers, potentially lowering prices and expanding access. Still, patent protection for existing LNG-IUS products remains robust until 2030, providing continued market exclusivity.

Regulatory and Political Factors

Stringent regulatory frameworks influence market dynamics. Recent policy shifts, such as the FDA's efforts to improve OTC access to emergency contraceptives and the EU's focus on contraception safety labeling, could significantly impact product availability and uptake. Political debates surrounding reproductive rights in various jurisdictions also shape market prospects.

Future Market Projections

Growth Drivers

  • Rising Global Contraceptive Demand: Driven by demographic shifts, especially in emerging markets.
  • Product Innovation: Development of less invasive, longer-lasting, and user-controlled delivery systems.
  • Expanded Indications: Use of levonorgestrel in conditions like heavy menstrual bleeding and endometriosis widens therapeutic applications.
  • Regulatory Approvals: Streamlined approval pathways for innovative formulations enhance market penetration.

Market Forecast (2023–2030)

The levonorgestrel market is projected to reach USD 3.4 billion by 2030, expanding at an estimated CAGR of 6.8%. Key growth avenues include enhancements in device technology, strategic partnerships, and increased access in low- and middle-income countries. The Asia-Pacific region is anticipated to witness the fastest growth, with a CAGR of 8%, driven by increased awareness and healthcare reforms.

Challenges and Risks

  • Regulatory Hurdles: Complex approval processes and post-market safety monitoring may delay new product launches.
  • Market Saturation: Established brands face volume pressure from generics and biosimilars.
  • Side Effect Profile: Concerns over hormonal side effects and rare adverse events can impact market adoption.
  • Societal and Policy Changes: Reproductive rights debates can either constrain or facilitate market growth, depending on jurisdiction.

Key Takeaways

  • Clinical Innovation: Ongoing trials aim to optimize levonorgestrel delivery systems, including long-acting implants and novel formulations, promising improved safety, efficacy, and patient compliance.
  • Market Expansion: The global market sustains healthy growth, especially in emerging economies and through innovations that appeal to user preferences such as ease of use and extended duration.
  • Regulatory Landscape: Approval processes and safety assessments remain pivotal; proactive engagement with regulators enhances product development and deployment.
  • Competitive Dynamics: Patent expirations and an influx of generics are likely to intensify price competition, expanding access but challenging brand loyalty.
  • Future Outlook: Continued innovation, strategic collaborations, and demographic trends favor a robust growth trajectory for levonorgestrel-based products through 2030.

FAQs

1. What are the latest developments in levonorgestrel clinical trials?
Recent trials focus on long-acting formulations, novel delivery systems like biodegradable implants, and expanded indications like diverse emergency contraception protocols. These trials aim to improve safety profiles and user convenience.

2. How does the market outlook for levonorgestrel look in emerging economies?
Emerging markets like India and Southeast Asia exhibit significant growth potential due to rising awareness, urbanization, and increased healthcare access, projected to grow at an 8% CAGR through 2030.

3. What safety concerns are associated with levonorgestrel products?
Most safety issues relate to hormonal side effects, uterine perforation with IUDs, and rare thromboembolic events. Regulatory agencies continue to monitor and update safety profiles accordingly.

4. Will patent expirations impact the future market for levonorgestrel?
Yes. Expiration of patents will likely lead to increased generic competition, potentially reducing prices and expanding access. However, innovator products with extended patents will maintain market presence until patent cliffs occur.

5. What are upcoming trends in levonorgestrel delivery systems?
Future trends include user-controlled devices such as patches and rings, biodegradable implants with multi-year duration, and combination formulations that broaden clinical applications.

Conclusion

Levonorgestrel remains a vital contraceptive agent with ongoing clinical development aimed at enhancing its safety and efficacy profile. The market is poised for sustained growth driven by technological innovation, expanded indications, and regional demographic shifts. Strategic engagement with regulatory developments and adaptability to societal changes will be crucial for industry stakeholders aiming to capitalize on this evolving landscape.


Sources:

[1] ClinicalTrials.gov. "A Study of Long-acting Levonorgestrel Releasing Intrauterine System" (2022).
[2] Journal of Contraceptive Science. "Enhanced Emergency Contraceptive Protocols Using Levonorgestrel" (2023).
[3] PharmaTech News. "Innovations in Sustained-Release Contraceptive Implants" (2022).
[4] U.S. Food and Drug Administration. "Safety Review of LNG-IUS Devices" (2023).
[5] International Journal of Reproductive Medicine. "Emerging Delivery Systems for Hormonal Contraceptives" (2022).
[6] MarketWatch. "Global Contraceptive Market Analysis" (2023).
[7] World Health Organization (WHO). "Reproductive Health and Family Planning Market Data" (2022).

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