> ## Content Index
> Fetch the complete content index at: https://www.fdaweb.com/llms.txt
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# Guide on Early Studies on Cell/Gene Therapies
- URL: https://www.fdaweb.com/guide-on-early-studies-on-cell-gene-therapies/
- Published: 2022-11-07T12:00:00.000Z
- Updated: 2026-09-14T18:05:28.000Z
- Author: David McFarland
- Tags: FDA Policy/General, #legacy-id-D5153136

*Federal Register* notice: FDA has made available a final guidance entitled “Studying Multiple Versions of a Cellular or Gene Therapy Product in an Early-Phase Clinical Trial.” The document provides recommendations to sponsors about studying multiple versions of a cellular or gene therapy product in an early phase clinical trial for a single disease. To view the notice, click [here](https://www.govinfo.gov/content/pkg/FR-2022-11-07/pdf/2022-24112.pdf?ref=fdaweb.com).