It is caused by genetics attributed to the mother or father; and hormones, specifically testosterone and dihydrotestosterone (DHT).

Some women have genetically determined hair loss or hair loss from a series of medical conditions or genetic inheritance. Others may experience hair loss from surgery, or injury. Still others experience hair loss from wearing very tight hairstyles that exert constant pull on the hair. Because some hair loss in women can be caused by underlying medical conditions, it is important that women with undiagnosed hair loss be evaluated by their own physicians.

The primary factors are Genetic and Hormonal but also Medications, Post-partum changes, Stress, Menopausal changes and Diet may influence hair growth and hair loss.

Medication - Birth control pills, acne medication, weight loss treatments, steroids, blood pressure medication, heart disease and diabetic medications. Medical Conditions - Child birth, seborrhea, stress, trauma, high fever, thyroid disease, low protein or high fat diets.