Dr. Creinin is Professor and Chair of the Department of Obstetrics and Gynecology at the University of California, Davis. Dr. Creinin graduated Alpha Omega Alpha from Northwestern University Medical School in Chicago, IL. He completed his residency in Obstetrics and Gynecology at the University of California, San Francisco. Dr. Creinin completed two fellowships at the University of California, San Francisco: a Family Planning fellowship from the Department of Obstetrics, Gynecology, and Reproductive Sciences and a Clinical Research Fellowship from the Departments of Medicine and Epidemiology and Biostatistics. Dr. Creinin moved to the University of California, Davis Medical Center in July 2011 after spending 17 years on the faculty at the University of Pittsburgh, where he served as the Director of Gynecologic Specialties and as the Director of Family Planning.

Dr. Creinin has been a lead investigator for numerous clinical trials spanning more than 15 years, including being the overall principal investigator for multicenter studies and data coordinating centers. Dr. Creinin receives research funding from the NIH, USAID, private foundations and industry. He is a well-respected author of more than 125 peer-review papers in addition to numerous review articles, book chapters and books related to Family Planning and Contraception.