What is the main characteristic of the Catagen phase of hair growth?

The primary characteristic of the Catagen phase of hair growth is that hair cells stop reproducing. During this transition phase, which follows the Anagen (growth) phase, the growth of the hair slows down, and the hair follicle begins to shrink. As a result, the hair's attachment to the follicle weakens, and this is when the process of shedding starts to prepare for the Telogen phase (resting phase).

In the Catagen phase, the hair is no longer growing actively, which is why hair cells cease to reproduce. This phase generally lasts for a short duration, typically a few weeks, and is a crucial part of the hair growth cycle that ensures the health and renewal of hair follicles. Each phase of hair growth has distinct characteristics, and recognizing these helps in understanding hair health and growth patterns.