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
Email: christopher.zahn@usuhs.edu

Ms. Tanya Christian
Clerkship Coordinator
Phone: (301) 295-3777
FAX: (301) 295-0419
tanya.christian@usuhs.edu

Katerina Shvartsman, MD
Assistant Professor
Director of Clinical Clerkships
Phone: (301) 295-3777
katerina.shvartsman@usuhs.edu

Tracy Smith
Admimistrative Officer
Phone: (301) 295-3430
Fax: (301) 295-0419
Email: tracy.smith@usuhs.edu.

Col Ernest G. Lockrow, DO, MC, USA
Associate Professor
Director, Continuing Education
Phone: (301) 295-2270
Fax: (301) 295-0419
Email: ernest.lockrow@usuhs.edu

Fellowship Information

Fellowship Program Director: James H. Segars, M D.
Associate Program Director: Alicia Armstrong, M.D., M.H.S.C.R.
Associate Program Director: William H. Catherino, M.D., Ph.D.
On Site Program Director Shady Grove Fertility: Eric Widra, M.D.
Program Assistant: Donna Tatham


Eligibility Criteria

Qualified candidates must be U.S. citizens who have completed a U.S.-approved four-year residency in Obstetrics and Gynecology (PGY-4) and must be eligible for board certification by the American Board of Obstetrics and Gynecology. Due to the nature of the training program and rotations, this requirement cannot be waived.

Overview of Program

Poster Display

The Federal Fellowship in Reproductive Endocrinology is comprised of faculty from four institutions: the National Institute of Child Health and Human Development (NICHD), the Uniformed Services University of the Health Sciences (USUHS), Walter Reed National Military Medical Center (WRNMMC), and the Shady Grove Fertility Center. The Federal Fellowship in Reproductive Endocrinology has the mission to train reproductive endocrinology and infertility fellows who will serve as faculty in military, government, and academic institutions in order to establish and maintain high standards of training for students and residents in obstetrics and gynecology and to provide evidence-based cutting edge treatments to couples with infertility. The program accepts civilian and military graduates of U.S. residencies in Obstetrics and Gynecology.

The three-year training program is structured to capitalize on the particular strengths and resources of each participating institution. Specifically, infertility services and operative care is provided by the busy clinical services at Walter Reed Bethesda Hospital, the NIH Clinical Center, and at Shady Grove Fertility Center. Experience in the Assisted Reproductive Technologies (ART) is provided by rotation in the newly renovated, state-of-the-art Walter Reed Bethesda ART facility and at Shady Grove Fertility Center. Fellows also obtain medical endocrine, pediatric endocrine, and genetic clinical training through rotation on the active inpatient services at the NIH Clinical Center. In addition, outstanding research training is available either though NIH intramural laboratories in the National Institute of Child Health and Human Development or at the Uniformed Services University of the Health Sciences. The program is intended to achieve synergistic interaction between the four sponsoring institutions, and provide fellows with an experience and resources not available from a single institution. Since its inception in 1978, the Federal Fellowship in Reproductive Endocrinology Program trained over sixty five fellows, many who have become prominent leaders in the reproductive sciences.

Fellowship Group