Aside from any genetic predisposition to hair loss, hormonal changes, especially the menopause, have been shown to significantly contribute to the reasons for womens hair loss with other factors including stress, poor diet and illness.
The most common cause is hormonal, and an excess of one called DHT which shrinks the follicles making the hair gradually thinner until it falls out. Loss of hair in women is more usual after the menopause as this is when estrogen levels drop significantly. Estrogen naturally blocks the DHT so afterwards, the DHT levels rise …