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Share of registered clinical trials worldwide as of March 2025, by phase

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Source

Release date

April 2025

Region

Worldwide

Survey time period

As of March 7, 2025

Supplementary notes

Values are as of March 7, 2025, based on data starting in 2005.

The sum may not add up to 100 percent due to rounding effects.

Citation formats

Share of registered global clinical trials by phase 2025

Published by A. Minhas, Oct 7, 2025

As of March 2025, roughly ** percent of the registered clinical trials worldwide were in Phase 1, with a further 3.8 percent between Phase 1 and Phase 2. Meanwhile, only percent of the trials were in Phase 4. For a majority of clinical trials, however, there was no exact phase information available.

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