Human hair growth
The three stages of hair growth are the anagen, catagen, and telogen phases. Each strand of hair on the human body is at its own stage of development. Once the cycle is complete, it restarts and a new strand of hair begins to form. The rate or speed of hair growth is about 1.25 centimetres or 0.5 inches per month, or about 15 centimetres or 6 inches per year.
Chest hair
Chest hair is hair that grows on the chest of a person in the region between the neck and the abdomen. Chest hair develops during and after puberty along with other types of androgenic hair.