> ## Documentation Index
> Fetch the complete documentation index at: https://glossary.micahealth.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Extension request

A formal request to delay submitting study results beyond the standard one-year deadline, which must show good cause and receive National Institutes of Health approval.

## Related terms

<CardGroup cols={3}>
  <Card title="Observational study" href="observational_study" />
</CardGroup>

[*Source*](https://clinicaltrials.gov/study-basics/glossary)