February 20, 2026 | By HSW Clinic

Hair growth consists of three phases: anagen, catagen, and telogen.
The anagen phase marks the active growth period of a hair follicle. During this phase, cells in the hair bulb divide, contributing to the elongation of the hair strand. The length of the anagen phase varies individually, with scalp hairs remaining in this growth stage for several years. The duration of this phase plays a crucial role in determining the length of your hair.
The catagen phase represents a transitional period where the hair follicle undergoes regression. This relatively short phase serves as a bridge between the active growth of anagen and the resting phase of telogen.
The telogen stage represents the resting period within the hair growth cycle. In this phase, the hair follicle remains inactive, and the current hair naturally falls out, creating space for the emergence of new hair. Typically, about 10–15% of our hair is in the telogen phase concurrently. External factors such as stress, illness, or hormonal changes can influence the duration of this phase.
Understanding the natural hair growth cycle is fundamental for grasping the dynamics of a successful hair transplant. Surgeons carefully consider the existing hair phases when planning and executing a transplant procedure. Transplanting hair follicles during the anagen phase, when they are actively growing, ensures a higher likelihood of successful graft survival and long-term results.
Transplanting hair follicles during the anagen phase increases the chances of successful integration into the recipient area.
A hair transplant primarily redistributes existing hair follicles; it does not alter the intrinsic growth cycle. Transplanted hairs will continue to follow their natural growth pattern.
Understanding the nuances of hair phases is a crucial step for individuals considering a hair transplant. The knowledge of the anagen, catagen, and telogen phases provides insight into the intricate world of hair growth cycles, empowering individuals to make informed decisions about their hair restoration journey.
If you’re exploring the possibilities of a hair transplant, consult with a qualified professional who can guide you through the process, taking into account the unique characteristics of your hair and its natural growth phases.
