Daily chart quiz · #22 · November 7, 2026
How many clinical trials start each year?
Your guess for 2025
Measure: Clinical trials started
- 31,149 Answer
- 17,132 Your guess
- 40,494
- 23,362
Not quite. You picked 17,132. The figure for 2025 is 31,149.
About 31,100 clinical trials registered on ClinicalTrials.gov started in 2025, up from about 11,900 in 2008 and 1,900 in 2000, the registry's first year. Early years count fewer trials because registering wasn't required until medical journals asked for it in 2005 and a U.S. law did in 2007; late registrations still add a few to recent years. ClinicalTrials.gov lists trials from around the world, not only the U.S.
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Chartly daily chart quiz #22: ❌ Missed it. Can you guess the number? How many clinical trials start each year? https://chart.ly/quiz
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Source: ClinicalTrials.gov (U.S. National Library of Medicine), counted with its API v2 · Public domain (U.S. government work); source National Library of Medicine · Data as of
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