• Türkçe
  • English
Hair growth and the hair cycle PDF Print E-mail
The normal human scalp contains between 100,000 to 150,000 follicles that produce thick terminal hair. These hairs do not emerge individually from the scalp, but are arranged in follicular units, small groups of 1 to 4 hairs each. There are approximately 50,000 to 65,000 follicular units on the human scalp. For comparison, the human body has approximately 5 million follicles that produce the fine, vellus hair.

At any given time, about 90% of terminal hairs on one's head are actively growing. This phase, called anagen, can last from 2 to 7 years, though the average is about three years. In catagen, which is the shortest phase lasting about 2-3 weeks, growth stops, the middle of the follicle constricts and the lower portion expands to form the "club." The other remaining 10% of scalp hairs are in a resting state called telogen that, in a normal scalp, lasts about 3 to 4 months.

When a hair enters its resting phase, growth stops, and the bulb detaches from the papilla, and the shaft is either pulled out (as when combing one's hair) or pushed out when the new shaft starts to grow. When a hair is pulled out, or falls out on its own, a small, white swelling is found at the bottom of the hair shaft. Most people assume that this is the growth center of the hair, but it is just the clubbed, detached lower end of the hair shaft. The dermal papillae and the growth center of the hair remain in the scalp. Scalp hair grows at a rate of about 0.44 mm/day (or 1/2 inch per month). Each hair follicle goes through the hair cycle 10-20 times in a lifetime.

Humans normally lose about 100 hairs per day; everyone has a few hairs stuck to the comb each time they comb their hair. The presence of a large number of hairs on the comb, in the sink, or in the tub, can be a sign of hair loss caused by disease or medications. Common genetic balding, however, is not caused by excessive hair loss, but rather by the successive replacement of hair that is normally lost with smaller, finer hair - a process called "miniaturization."
  • Polls
  • Google Maps
What is the most important criterion in hair transplantation?
Click to the image below to find our clinic location on the map and satalite:

Hair transplantation Ankara Civac Clinic- Google Maps

Multimedia Center

hair transplantationBaldness - What causes it?

Learn why our genes largely determine whether we go bald or keep our hair...




hair transplantation"DHT" is the main culprit

Learn how the hormone DHT acts on vulnerable folicles and makes them thin and wither away...Watch...



hair transplantationHow hair transplants work

Learn how hair transplants relocate bald resistant hair folicles to the balding areas...




hair transplantationThe ultimate hair transplant

Learn how follicular unit hair transplantation replicates nature hair for hair...Watch...



hair transplantationWhat hair transplantation can do

Learn what you can realistically achieve with hair restoration surgery given your degree of hair loss...Watch...



hair transplantationRecreating a full look

Learn how redistributing hair follicles can recreate a full look even at half your original density...Watch...



hair transplantationCreating a hair restoration plan

Learn how you can create a holistic hair restoration plan in consultation with a physician...Watch...



hair transplantationCalculate # of grafts needed

Use our graft calculator to estimate the number of hair grafts you may need...Calculate...





Member of these foundations:

Laser hair removal

Lazer epilasyon, lazerle epilasyon, lazerli epilasyon


Hair laser removal has become the top non-surgical cosmetic procedure for the under 35 crowd for both men and women. For those of you wondering how laser hair removal works it targets the melanin...

Ankara plastic surgery

burun estetigi, gogus estetigi, estetik burun


If you feel that your nose is not a good fit, you may benefit from cosmetic surgery of the  nose, also called rhinoplasty. Rhinoplasty can enhance the shape, size and general appearance of your nose.

Free consultation


Online consultation form 

You can send us your questions about hair transplantation, laser hair removal and plastic surgery operations and take our replies anytime. Please don't hesitate to send your consultations to our doctors.