Final answer:
The telogen, or resting stage, of hair growth lasts about 2 to 4 months.
Step-by-step explanation:
The telogen phase, or resting stage, of hair growth lasts about 2 to 4 months. During this phase, no new growth occurs as the hair follicle is at rest. At the end of the telogen phase, a new anagen phase begins and the old hair is pushed out as the growth cycle repeats itself.