Did you learn this in beauty school? Have you heard of FGF5? The hair growth cycle? Read on to learn about the formation, life and death of a single hair….the start of being a Hair Biologist….. Hair follicles are formed in the womb and the number of follicles is fixed at that time, we cannot grow more. The follicles form as a part of the epidermis, the outer layer of skin. The future follicles in the epidermis burrow down into the dermis, the deep layer of skin, to form hollo