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Last Updated: December 15, 2025

CLINICAL TRIALS PROFILE FOR HYDROXYPROGESTERONE CAPROATE


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All Clinical Trials for HYDROXYPROGESTERONE CAPROATE

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00099164 ↗ Trial of Progesterone in Twins and Triplets to Prevent Preterm Birth (STTARS) Completed Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) Phase 3 2004-04-01 Women pregnant with twins or triplets are at high risk of preterm birth, yet no intervention or approach has served to reduce this risk. A recently completed trial by the NICHD sponsored Maternal Fetal Medicine Units (MFMU) Network has, for the first time, demonstrated a treatment that substantially reduces the rate of preterm birth in women at high risk for preterm delivery (i.e. progesterone therapy). Preterm birth was reduced by 35% among progesterone-treated women with a singleton pregnancy when compared with women receiving placebo. The current trial compares weekly treatment by injection of progesterone with placebo in women pregnant with twins or triplets.
NCT00099164 ↗ Trial of Progesterone in Twins and Triplets to Prevent Preterm Birth (STTARS) Completed The George Washington University Biostatistics Center Phase 3 2004-04-01 Women pregnant with twins or triplets are at high risk of preterm birth, yet no intervention or approach has served to reduce this risk. A recently completed trial by the NICHD sponsored Maternal Fetal Medicine Units (MFMU) Network has, for the first time, demonstrated a treatment that substantially reduces the rate of preterm birth in women at high risk for preterm delivery (i.e. progesterone therapy). Preterm birth was reduced by 35% among progesterone-treated women with a singleton pregnancy when compared with women receiving placebo. The current trial compares weekly treatment by injection of progesterone with placebo in women pregnant with twins or triplets.
NCT00120640 ↗ Treatment of Preterm Labor With 17 Alpha-hydroxyprogesterone Caproate Withdrawn Yale University N/A 2005-07-01 The goal of our research will be to determine the effectiveness of 17 alpha-hydroxyprogesterone caproate (17P) in the treatment of preterm delivery. Treatment with progesterone is emerging as the standard of care for prevention of preterm delivery in asymptomatic patients at high risk for preterm birth due to a prior preterm delivery. Our goal is to evaluate whether or not progesterone is also effective in reducing preterm birth in symptomatic patients.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for HYDROXYPROGESTERONE CAPROATE

Condition Name

Condition Name for HYDROXYPROGESTERONE CAPROATE
Intervention Trials
Preterm Birth 7
Pregnancy 4
Premature Birth 4
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Condition MeSH

Condition MeSH for HYDROXYPROGESTERONE CAPROATE
Intervention Trials
Premature Birth 17
Obstetric Labor, Premature 3
Placenta Previa 3
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Clinical Trial Locations for HYDROXYPROGESTERONE CAPROATE

Trials by Country

Trials by Country for HYDROXYPROGESTERONE CAPROATE
Location Trials
United States 118
Hungary 6
Egypt 5
Czechia 4
Canada 4
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Trials by US State

Trials by US State for HYDROXYPROGESTERONE CAPROATE
Location Trials
Texas 9
Pennsylvania 8
California 7
North Carolina 6
Michigan 6
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Clinical Trial Progress for HYDROXYPROGESTERONE CAPROATE

Clinical Trial Phase

Clinical Trial Phase for HYDROXYPROGESTERONE CAPROATE
Clinical Trial Phase Trials
Phase 4 3
Phase 3 9
Phase 2/Phase 3 3
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Clinical Trial Status

Clinical Trial Status for HYDROXYPROGESTERONE CAPROATE
Clinical Trial Phase Trials
Completed 17
Recruiting 5
Terminated 3
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Clinical Trial Sponsors for HYDROXYPROGESTERONE CAPROATE

Sponsor Name

Sponsor Name for HYDROXYPROGESTERONE CAPROATE
Sponsor Trials
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) 7
AMAG Pharmaceuticals, Inc. 6
The George Washington University Biostatistics Center 3
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Sponsor Type

Sponsor Type for HYDROXYPROGESTERONE CAPROATE
Sponsor Trials
Other 31
Industry 11
NIH 8
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Hydroxyprogesterone Caproate: Clinical Trials Update, Market Analysis, and Future Outlook

Last updated: October 28, 2025


Introduction

Hydroxyprogesterone Caproate (HPC), a synthetic progestin, has historically played a significant role in the prevention of preterm birth in high-risk pregnant women. As of 2023, ongoing clinical developments, evolving market dynamics, and regulatory landscapes shape the landscape for HPC. This article provides a comprehensive overview of recent clinical trial developments, an in-depth market analysis, and projected growth trajectories for HPC in the coming years.


Clinical Trials Update

Current Clinical Landscape

Hydroxyprogesterone Caproate's clinical research has historically centered on its efficacy in reducing preterm birth risks. The most notable studies include the Progestin's Role in Preventing Preterm Birth (PREVAIL) trial and subsequent observational research that supports its use in specific populations.

As of 2023, several ongoing trials aim to evaluate expanded indications, new formulations, or alternative delivery mechanisms:

  • Enhanced Delivery Systems: Phase II trials are investigating sustained-release formulations and biodegradable implants to improve compliance and reduce injection frequency. Such research could mitigate challenges associated with multiple intramuscular injections and associated discomfort [1].

  • Expanded Indications: New studies are exploring HPC's potential role in other gynecological or obstetric conditions, including recurrent pregnancy loss and certain hormonal deficiencies, though these remain preliminary.

  • Safety and Longitudinal Data: Ongoing cohort studies continue to monitor the long-term safety of HPC for both mothers and infants, particularly focusing on neurodevelopmental outcomes and maternal metabolic health.

Regulatory and Market-Related Clinical Updates

In 2021, the US Food and Drug Administration (FDA) approved Makena (brand name for HPC) for preventing preterm births in women with a history of spontaneous preterm birth. Post-approval surveillance continues, with some debates ongoing regarding the drug's risk-benefit profile, especially considering the high cost of therapy.

In 2022, the European Medicines Agency (EMA) reaffirmed HPC's status for preterm birth prevention but called for additional real-world evidence to support broader use.


Market Analysis

Historical Market Trends

The market for HPC has been historically driven by the prevalence of preterm birth (~10% globally as per WHO [2]) and the drug’s longstanding utilization. The global preterm birth prevention market was valued at approximately USD 150 million in 2021, with HPC constituting a significant share.

In the US, Makena was introduced in 2011, but sales have faced challenges due to high costs and questions about its efficacy, which prompted the introduction of biosimilar versions to increase market competition [3].

Current Market Dynamics

  • Regulatory and Reimbursement Challenges: After initial approval, payers have experienced mixed coverage decisions, leading to variable access, especially where cost-effectiveness debates persist.

  • Generic and Biosimilar Competition: The market has seen multiple biosimilar entrants since 2020, which have driven prices down. For instance, Teva’s Relistor biosimilar registered a 30% price reduction, influencing market penetration.

  • Emerging Markets: Rapidly developing regions in Asia-Pacific and Latin America now account for a growing proportion of HPC utilization due to rising preterm birth rates and expanding healthcare infrastructure.

Market Opportunities and Challenges

  • Opportunity: Development of long-acting delivery systems and combination therapies could expand use cases beyond current indications.

  • Challenge: Efficacy skepticism, coupled with high development costs and payer restrictions, continues to restrict market expansion.


Projected Market Outlook

Forecast for 2023-2030

Parameter Projection Implication
Market Value (2023) USD 120–150 million Stabilized due to biosimilar competition
Compound Annual Growth Rate (2023-2030) 4-6% Driven by unmet needs, regional market growth
Key Drivers Expanded clinical indications, biosimilar adoption, emerging markets Potential to redesign the market landscape
Major Risks Regulatory restrictions, reimbursement policies, efficacy concerns Could limit growth or lead to market contraction

Regional Projections

  • North America: Expected to dominate due to established healthcare infrastructure, though growth may be modest given existing market saturation.

  • Europe: Steady growth driven by regulatory stability and expanding indications.

  • Asia-Pacific: High growth potential (~7%), contingent on healthcare infrastructure improvements and rising preterm birth rates.

  • Latin America & Africa: Emerging markets with significant upside but require addressing logistical barriers and regulatory landscapes.


Strategic Implications for Stakeholders

  • Pharmaceutical Companies: Emphasis should be placed on developing innovative delivery mechanisms and expanding indications to differentiate offerings amidst biosimilar competition.

  • Investors: Focus on emerging markets and companies with robust clinical pipelines that aim to improve safety profiles and reduce costs.

  • Regulators and Payers: Need for clear guidelines and evidence-based reimbursement policies to optimize access and affordability.


Key Takeaways

  • Clinical progress for HPC involves novel formulations and expanded indications; however, ongoing trials are still evaluating long-term safety and efficacy, which may influence future approvals.

  • Market maturity is evident in regions like North America and Europe, with biosimilar competition exerting downward pressure on pricing, while emerging markets present growth opportunities.

  • Regulatory and reimbursement uncertainties remain significant hurdles, emphasizing the importance of real-world evidence and cost-effectiveness analyses.

  • Future growth hinges on innovations in drug delivery, new indications, and strategic market expansion, particularly in regions with rising preterm birth rates.

  • Stakeholders should prioritize R&D investments that demonstrate improved safety, convenience, and cost-efficiency to sustain market relevance.


FAQs

1. What are the main clinical benefits of Hydroxyprogesterone Caproate?
HPC primarily reduces the risk of spontaneous preterm birth in women with a history of preterm delivery, supporting pregnancy prolongation and neonatal health outcomes [1].

2. Are there ongoing trials investigating new uses for HPC?
Yes. Current trials focus on alternative delivery systems, such as sustained-release implants, and exploring potential uses in recurrent pregnancy loss, although these are in early stages [1].

3. How does biosimilar competition affect your market outlook?
Biosimilars entering the market since 2020 have driven prices down and increased access, challenging the profitability of originator products and urging innovation-driven differentiation.

4. What regional factors influence HPC market growth?
Developing regions like Asia-Pacific show promising growth due to rising preterm birth rates and expanding healthcare access, whereas developed markets face saturation but value-added innovations.

5. What are the key challenges hindering wider HPC adoption?
Efficacy debates, reimbursement policies, high costs, and patient compliance issues related to injections limit broader utilization.


References

[1] ClinicalTrials.gov. "Hydroxyprogesterone Caproate Trials." 2023.
[2] WHO. Preterm Birth Factsheet. 2022.
[3] FDA. FDA Approves Makena for Preterm Birth Prevention. 2011.

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