hairs transitioning between fine vellus and thick terminal stages
Indeterminate hairs are hairs that are in a transitional phase between vellus (fine, short, and lightly pigmented) and terminal (thick, long, and heavily pigmented) hairs. These hairs are often seen in areas of the body where hair is changing due to hormonal influences, such as during puberty or in conditions like androgenetic alopecia.
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