Female hair loss is generally related to either a fluctuation in your hormones, a low iron level in the body or increased stress levels. In terms of speeding up your hair growth, there are products you can use, such as the Kerastase Densifique Range consisting of a shampoo, masque and ampulse. Using the complete range guarantees you 33% increased hair density. The ampulse only needs to be taken as a 3 month course per year. You can also take Folic acid and vitamin b12, both of which speed up hair growth. To improve the condition of your hair, I would recommend regular in-salon treatments and regular cuts to remove split ends, and the very damaged pieces. Avoid using any extreme heat appliances on your hair, such as a curling tong or flat iron.