Skip to main content

An official website of the United States government

Search

About Cancer
Cancer Types
Research
Grants & Training
News & Events
About NCI

Home
About Cancer
Cancer Treatment
Clinical Trials Information
What Are Clinical Trials?
Phases of Clinical Trials
What Are Clinical Trial Phases?

Cancer Treatment

What Are Clinical Trial Phases?

This video explains the three main phases of clinical trials.

About

About this Website
en Español
Reuse & Copyright
Social Media

Resources

Contact Us
Publications
Dictionary of Cancer Terms
Find a Clinical Trial

Policies

Accessibility
FOIA
Privacy & Security
Disclaimers
Vulnerability Disclosure

Sign up for email updates

Enter your email address

National Cancer Institute at the National Institutes of Health

Contact Us

Live Chat

1-800-4-CANCER

NCIinfo@nih.gov

Site Feedback

Follow us

U.S. Department of Health and Human Services National Institutes of Health National Cancer Institute USA.gov