Hair grows in cycles and not all of the hair on your head will be growing at the same time. Generally speaking, around 90% of the hair on your head is actively growing or in the growth phase (Anagen) at any one time and an average growth rate amounts to more or less around a centimetre a month. The rest of your hair is in the Telogen stage or resting phase and it is normal during this phase for hair to fall out, sometimes as many as 100 hairs a day. The growth phase can last anything from 2 to 6 years and the resting phase usually lasts a few months.

There are many factors that will influence the length of your growth phase and how fast your hair will be able to grow and how easy it is for your hair to fall out during the Telogen phase and these include your diet, medication, your general health, and even stress, but one of the most significant factors that will influence whether or not you are likely to experience the typical male pattern baldness or widespread thinning of the hair is genetics.

The main cause of typical male pattern baldness in men and widespread thinning of the hair in women is linked to androgens (hormones) and is known as androgenetic alopecia. Your genes will dictate how sensitive you are to the effects of the male hormone DHT or dihydrotestosterone. High levels of DHT shorten the growth phase of the hair and over time shrink the hair follicle so that the hair thins out and eventually, no new hair is able to grow.

Of course if there is no remedy for your specific situation then you may want to look into a hair transplant, or transplant surgery. This may be the answer to the results you are looking for, with faster results than most other options also.