Christina Wang, MD is a Professor of Medicine, Assistant Dean at the David Geffen School of Medicine at UCLA, and Senior Associate Director for Clinical and Translational Science Institute and a faculty member of the Division of Endocrinology, Department of Medicine, Harbor-UCLA Medical Center and The Lundquist Institute, Torrance, California. Dr. Wang has been involved in many funded basic and clinical research studies. Her current clinical research studies include androgen replacement therapy, hormonal male contraceptive development, late onset hypogonadism, accurate assessment of serum androgens, diet and androgen metabolism, environment and life style modifications on sperm parameter and more recently sperm epigenome. Her basic research studies focus on the regulation of spermatogenesis. She has authored over 350 peer-reviewed publications, 70 chapters and reviews. Dr. Wang served on the Executive Council, several committees and President of the American Society of Andrology (2006-2007).