Alabama Hair Transplant

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Hair Facts

Close-up of hair on skin
Adults have two basic types of hair — terminal hair and vellus hair

Diagram showing hair follicle and shaft
Hairs grow from follicles within the skin

Diagram showing the anagen, catagen and telogen phases of hair growth
People naturally shed up to 100 hairs a day

Man and woman with hair loss
Androgenetic Alopecia is the most common cause of hair balding or thinning

Terminal and Vellus Hair

Adults have two basic types of hair: terminal hair and vellus hair. Terminal Hair grows on the scalp and varies greatly among different people in color, curliness and texture. Vellus Hair is the short, fine, light-colored hair that grows on most places of the body, including the face, back and armpit.

Hair Follicles

Prior to any hair loss, the average person has about 100,000 scalp hairs. Each of these hairs grows from a follicle within the skin. These hair follicles are naturally bundled together by collagen fibers into follicular units, each containing from one to four follicles.

Phases of Hair Growth

Hairs are shed daily and replaced by new hairs as part of the normal cycle of human hair growth. At any given time, about 90% of hair follicles are in the Anagen Phase, or growing phase. Follicles may remain in the growing phase for 2 to 6 years, during which terminal hairs on the scalp usually grow about 1/2 inch per month. Next, hair follicles enter the Catagen Phase (transition phase) for 2 to 4 weeks before entering the Telogen Phase (resting phase) for 2 to 4 months. Hair shed during the resting phase — the hair you may see on your brush or in the shower — is naturally replaced by new anagen hair.

Male and Female Pattern Baldness

The majority of both men and women who lose hair beyond what is naturally shed do so because of an inherited condition called Androgenetic Alopecia. Genetic hair loss usually occurs between 20 and 45 years of age, but can appear in younger people and continue thoughout one's lifetime.

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