Hair loss that is genetic is known as Androgenetic Alopecia and, according to the American Academy of Dermatology, is the most common cause of hair loss.
Androgenetic alopecia is the most common cause of hair loss. It is usually associated with aging and develops in predictable stages over varying periods of time. Alopecia areata is thought to be an immune system disorder that causes follicles to stop producing hairs in patches on the head. Seek solutions after determining what has caused their loss in the first place.