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It is commonly stated that hair grows about 1 cm per month on average; however reality is more complex, since not all hair grows at once. Scalp hair was reported to grow between 0.6 cm and 3.36 cm per month. The growth rate of scalp hair somewhat depends on age (hair tends to grow more slowly with age), sex, and ethnicity. [3]
The hair follicle is an organ found in mammalian skin. [1] It resides in the dermal layer of the skin and is made up of 20 different cell types, each with distinct functions.. The hair follicle regulates hair growth via a complex interaction between hormones, neuropeptides, and immune cells
The growth rate of hair varies from individual to individual depending on their age, genetic predisposition and a number of environmental factors. [14] It is commonly stated that hair grows about 1 cm per month on average; however reality is more complex, since not all hair grows at once. Scalp hair was reported to grow between 0.6 cm and 3.36 ...
Minoxidil, applied topically, is widely used for the treatment of hair loss. It may be effective in helping promote hair growth in both men and women with androgenic alopecia. [20] [21] About 40% of men experience hair regrowth after 3–6 months. [22] It is the only topical product that is FDA approved in America for androgenic hair loss. [20]
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Vellus hair replaces lanugo hair on a human fetus at 36 to 40 weeks of gestation. [2] The growth cycle of vellus hair is different from the growth cycle of terminal hair. At puberty, androgen hormones cause much of the vellus hair to turn into terminal hair and stimulate the growth of new hair in the armpit and the pubic area. In men, this ...
The second proposed mechanism involves the hair follicle growth cycle. Human hair follicles follow a growth cycle that has three stages: anagen, catagen, and telogen. [16] Active growth of the hair follicle occurs during the anagen phase. During the catagen phase, the hair follicle undergoes a process to prepare for hair shedding.
Average physical and mental growth. [4] The diagnosis is confirmed by microscopic analysis of the hair, which displays short telogen hairs with tapering tips, indicating uncut hairs. [1] Differential diagnosis for short hair consists primarily of loose anagen syndrome (LAS), congenital hypotrichosis, and hair shaft diseases. [5]