Male pattern hair loss (MPHL), also known as androgenetic alopecia (AGA), is the most common form of hair loss in men. Similarly, female pattern hair loss (FPHL) is the most common form of hair loss in women.
MPHL especially frontal baldness is ore common then reported. Recent research conducted on community samples of men, aging from 18 to 49 years old showed 42% (extensive hair loss or type III or greater), with moderate to extensive hair loss increase with age.
Other research shows that Chinese, Japanese, and African American people are affected less than Caucasians. In one of the research done on MPHL and FPHL showed that MPHL is common in the Australian community. The severity of MPHL is based on the Norwood Hamilton Classification
FPHL is evaluated based on the Ludwig scale, which ranges from I-III. Female pattern hair loss (FPHL) is the most common hair loss disorder in women. Initial signs may develop during teenage years leading to a progressive hair loss with a characteristic pattern distribution.
The FPHL is a nonscarring progressive thinning of hair. FPHL is very common and increases with age in the Caucasian women populations. In 2001, Norwood established the prevalence of FPHL at 19 percent in a series of approximately 1000 Caucasian women