Leo Han, M.D., M.P.H. is an Associate Professor of Obstetrics and Gynecology. He completed medical school at Northwestern (2010), residency at the University of Colorado (2014), and fellowship here at OHSU (2017) with a Master’s in Public Health.  He currently is also a former Reproductive Science Development Program (RSDP) K12 scholar.

Dr. Han provides full spectrum obstetric and gynecologic care at the Center for Women’s Health, with a focus on family planning.

Dr. Han’s research spans a diverse range in reproductive health and family planning.  His primary research involves non-hormonal contraceptive discovery and understanding fertility regulation in the lower reproductive tract. In particular, he is interested in the cervix as a target for new contraceptive methods and has clinical, translational and basic science projects focused on studying the effects of progestogens and non-steroid modulators of mucus on the endocervix. He is also interested in the intersection of family planning and the internet, and understanding how digital information platforms influence the public perception of contraception and abortion care.  Dr. Han is the co-director of the resident research program at OHSU. 

Dr Han’s major research focus is in developing new, non-hormonal contraceptives.  His projects in contraception have led to collaborations with research scientists at the Oregon National Primate Research Center (ONPRC), the Population Council, University of North Carolina, and the World Health Organization (WHO). His current research is on regulation cervical mucus, specifically, defining the endocervix as a target for fertility regulation.