The rate of hair growth is about 1/2 inch per month. The life of each hair includes cycles of growth (Anagen phase) and rest (Telogen phase) which for scalp hair takes around 2 to 6 years ending with hair fall out. After the falling of hair a new hair grows in its place. In a normal person, 85 percent of hair is growing at any given time and the other 15 percent is resting.
Baldness is a condition in which new hair does not grow when old hair falls or the new hair is miniaturized. The cause of this condition in female pattern baldness is not entirely understood, but it seems to be associated with genetic, hormonal changes, aging and deficiencies. Hormonal changes are commonly seen in the menopausal period when scalp hair is thinned, while facial hair grows coarser.
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