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LIAO Jin-feng, DUAN Xi-ling. Institute of Dermatology and Venereology, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, Chengdu 610072, China Corresponding author: DUAN Xi-ling, Email: uanxilingd@hotmail.com ��Abstract�� Androgenic alopecia ��AGA�� is a kind of androgen-dependent polygenic disease characterized by the progressive thinning and loss of hairs on the vertex. Pathologically, it manifests as a gradual decrease in the volume and density of hair follicles as well as in the anagen/telogen ratio. As a common disease in dermatology clinics, AGA often has considerable adverse influence on patients′ appearance and mental health. How to effectively treat AGA has remained a focus in the field of dermatology at home and abroad. ��Key words�� Alopecia; Androgens; Therapy; Transplantation, hair