In addition to a full time clinical practice in psychology, William D. Petok, PhD is a Clinical Associate Professor of Obstetrics and Gynecology at Thomas Jefferson University. He earned  his doctorate at the University of Maryland, College Park, in 1978.

Dr. Petok is currently a board member of the Path 2 Parenthood (formerly the American Fertility Association) and a member of the Executive Council of the Society for Assisted Reproductive Technology. He is a past chair of the Mental Health Professional Group of the American Society for Reproductive Medicine.  He regularly speaks on sexuality and assisted reproductive technologies at professional meetings.

His publications include book chapters on Infertility Counseling, Sexuality and Gender Based Differences as well as journal articles on Male Factor Infertility, the interface of religion and sexuality and  the treatment of sexual dysfunctions.