Anagen Stage (the growing phase - 3-5 years)
The growing phase of hair is called Anagen. Each hair grows for 3-5 year, average at the rate
of 0.35 mm/day, 1 cm/month or 12 cm/year. Hair above the aarector pili constitutes the
permanent portion of the hair because it remains intact during the entire hair cycle. Lower
portion of the hair go through regression, rest and regeneration. After completing the growing
phase, the hair goes through regression phase lasting 2-3 weeks called catagen stage. After
Catagen, hair goes through a resting phase lasting 3 month called Telogen stage. After
completing the resting stage, hair enter into growing phase. The club hair is shed. The stem
cells of the follicular bulge are activated and form a population of rapidly proliferating cells.
These cells descend into the vacant and collapsed fibrous root sheath along papilla. The hair
matrix is reformed and various layers of the hair differentiate. The new anagen hair will continue
to produce a hair shaft for next average 3-5 years.
Hair Transplant
The growing phase of hair is called Anagen. Each hair grows for 3-5 year, average at the rate
of 0.35 mm/day, 1 cm/month or 12 cm/year. Hair above the aarector pili constitutes the
permanent portion of the hair because it remains intact during the entire hair cycle. Lower
portion of the hair go through regression, rest and regeneration. After completing the growing
phase, the hair goes through regression phase lasting 2-3 weeks called catagen stage. After
Catagen, hair goes through a resting phase lasting 3 month called Telogen stage. After
completing the resting stage, hair enter into growing phase. The club hair is shed. The stem
cells of the follicular bulge are activated and form a population of rapidly proliferating cells.
These cells descend into the vacant and collapsed fibrous root sheath along papilla. The hair
matrix is reformed and various layers of the hair differentiate. The new anagen hair will continue
to produce a hair shaft for next average 3-5 years.
Hair Transplant
