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Related Experiment Video

Updated: Feb 10, 2026

Gene Expression Analyses in Human Follicles
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The Follicle Cycle in Brief.

Jeffrey E Plowman1, Duane P Harland2

  • 1AgResearch Ltd., Lincoln, New Zealand. Jeff.Plowman@agresearch.co.nz.

Advances in Experimental Medicine and Biology
|May 26, 2018
PubMed
Summary

This study overviews the hair follicle cycle, detailing its transition from the resting telogen phase to active hair production in anagen, followed by regression through catagen back to telogen.

Area of Science:

  • Dermatology
  • Cell Biology
  • Molecular Biology

Background:

  • The hair follicle undergoes a cyclical process involving growth, regression, and rest.
  • Understanding these transitions is crucial for addressing hair loss disorders.

Purpose of the Study:

  • To provide a succinct overview of the hair follicle cycle.
  • To describe the biological transitions between telogen, anagen, and catagen stages.

Main Methods:

  • Literature review of hair follicle biology.
  • Synthesis of current knowledge on follicular cycling.

Main Results:

  • Detailed description of the telogen (quiescent) stage.
  • Explanation of the transition to the anagen (active growth) stage.
Keywords:
AnagenCatagenHair cycleHair follicleSkinTelogen

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  • Overview of the catagen (regression) stage leading back to telogen.

    • Conclusions:

    • The hair follicle cycle is a dynamic process essential for hair regeneration.
    • Knowledge of these stages aids in understanding and potentially treating follicular abnormalities.