Human Scalp hairs are in two categories:

1- Resistant hair without testosterone Receptor in Back and Donor area and some parts of body.

2- Non – Resistant hair with testosterone Receptor in Remaining areas.
As Puberty Developes; due to Blood androgen hormones Increase; Non Resistant hairs are impressed Of testosterone and begin to shedding. this process will last to the end of life but Resistant hairs would be intact and the Source of transplanted hairs. we harvest these hairs and implant them in bald areas.

Male Pattern Baldness (MPB):
MPB is generally due to Androgenetic Alopecia and is Including of genetic and androgen Factors.

These Factors are the causes of More than 95 % MPB and other causes Like chemotherapy, Radiotherapy, Auto immune diseases; inflammatory disorders; Hypothyroidism consist less than 5 % of MPB.

MPB is different with Female and Following Feagure Shows this Pattern.
 

Norwood Hamilton Scale
 

Female hair loss:

In last Decade; Female hair transplant techniques have developed and ability for treating most Female baldness patterns has incredibly improved. they already thought that could Never be a Surgery candidate but Now they are elective Surgery candidates.

Female hair loss is a common event and 40 % of Female population are impressed. a lot of women are Suffering thin and Sparse hair in age. with increasing the age and as Androgen hormones increase around Meno pause; hair loss Increases dramatically and causes Psychological crisis.

Female hair loss is more under impression of genetic and hormonal imbalance Factors. hair loss is also due to Androgenetic Alopecia and can be Started From 20 yrs.

Other causes Like Stress; emotions and mensturation disorders can worsen hair loss Intensity. Following Feagure Shows Female hair loss Scheme.

Ludwig Scale