Contact Information

Obstetrics and Gynecology

Uniformed Services University of the Health Sciences
Department of Obstetrics and Gynecology
4301 Jones Bridge Road
Bethesda, Maryland 20814-4799

Christopher M. Zahn, MD
Col (Ret), USAF, MC
Professor and Chair
Department of Obstetrics and Gynecology
Phone: (301) 295-3430
FAX: (301) 295-0419

Ms. Tanya Christian
Clerkship Coordinator
Phone: (301) 295-3777
FAX: (301) 295-0419

Katerina Shvartsman, MD
Assistant Professor
Director of Clinical Clerkships
Phone: (301) 295-3777

Tracy Smith
Admimistrative Officer
Phone: (301) 295-3430
Fax: (301) 295-0419

Major Clinical and Research Interests of the Faculty

  • James H. Segars, M.D., Uterine Fibroids and hormone action
  • Alan H. DeCherney, M.D., Reproductive Surgery and Assisted Reproduction
  • Alicia Armstrong, M.D., Ethnic Disparities in reproduction and fertility preservation
  • William H. Catherino, M.D., Ph.D., Uterine Fibroids
  • Belinda Yauger, M.D., Clinical Reproductive Endocrinology
  • John Csokmay, M.D., Assisted Reproduction
  • Erin Wolff, M.D., Endometrial stem cells and endometriosis
  • Rebecca Chason, M.D., Assisted Reproduction
  • Lawrence M. Nelson, M.D., Premature Ovarian Insufficiency
  • Paul Driggers, Ph.D., Molecular Mechanisms of Steroid Action
  • Eric Widra, M.D., Assisted Reproduction Outcomes
  • Robert Stillman, M.D., Outcomes of Infertility treatment
  • Michael Levy, M.D., Assisted Reproduction and Infertility treatment outcomes

Medical Endocrinology

  • Lynnette Nieman, M.D., Progesterone Action in Reproduction, Endometrium, Cushing's Syndrome and Disease

Pediatric Endocrinology

  • Constantine A. Stratakis, M.D., D.M.Sci., , Physiology and Pathophysiology of the Hypothalamic-Pituitary-Adrenal Axis


  • Aidita James, Ph.D., Assisted Reproduction, Zygote and embryo assessment

Adjunct Faculty

  • Kevin Richter, Ph.D., Statistical analysis of reproductive outcomes
  • Tomoshige Kino, Ph.D., Nuclear receptor signaling, Ovarian physiology, glucocorticoid action