Anagen phase
Anagen phase
The Anagen phase (/əˈnædʒən/; from the Greek 'ana', meaning 'upward' and 'genesis', meaning 'creation') is the active growth phase of hair follicles during which the root of the hair is dividing rapidly, adding to the hair shaft.
Overview
During the Anagen phase, the hair follicle penetrates the deeper levels of the dermis and subcutaneous tissues, allowing for the hair to take root and begin its growth cycle. This phase can last from two to six years, and the length of this phase determines the maximum length of a hair strand.
Stages
The Anagen phase is divided into six stages: Anagen I, Anagen II, Anagen III, Anagen IV, Anagen V, and Anagen VI. These stages represent the transformation of the hair follicle from a tiny structure to a fully developed, hair-producing organ.
Relation to other hair growth phases
The Anagen phase is followed by the Catagen phase, a short transition stage that lasts about two weeks, and the Telogen phase, the resting phase, which lasts around one to four months. After the Telogen phase, the hair follicle re-enters the Anagen phase and the cycle repeats.
Factors affecting the Anagen phase
Various factors can affect the duration and quality of the Anagen phase, including genetics, nutrition, and overall health. Certain medical conditions, such as Alopecia, can disrupt the Anagen phase, leading to hair loss.
See also
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