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Women's Health Outreach Guide: Ob/Gyn

The Women’s Health LibGuide aims to provide information resources that offer support and a collaborative forum to learn more about women’s health issues from expert sources.

UMMS Featured Ob/Gyn Faculty Researchers

Nancy Byatt, DO, MBA

Assistant Professor of Psychiatry and Obstetrics & Gynecology

Psychiatrist, Psychosomatic Medicine and Women’s Mental Health

Expertise: Psychosomatic Medicine, Perinatal Mental Health

Nancy Byatt, D.O., M.B.A. completed her undergraduate degree, Honors Scholar Research Program, and College Scholars Research Program in Behavioral Neuroscience at Lehigh University. Dr. Byatt concurrently earned her medical degree from the New York College of Osteopathic Medicine and MBA from the New York Institute of Technology. She trained as a psychiatric resident at UMass Medical School/UMass Memorial Health Care where she was chief resident in psychosomatic medicine and co-chief resident in psychopharmacology research. She then completed a psychosomatic medicine fellowship at Brigham and Women’s Hospital/Harvard Medical School. Dr. Byatt joined the faculty at UMass Medical School in July 2008 as an Assistant Professor of Psychiatry and in 2012 was awarded a secondary appointment in Obstetrics and Gynecology. Dr. Byatt is a psychosomatic medicine psychiatrist with subspecialty expertise in perinatal mental health. She provides expert psychiatric consultation to medical, obstetrical and surgical providers in inpatient settings. She also provides outpatient short-term treatment and consultation for women suffering from mental illness during pregnancy and in the postpartum period. Dr. Byatt’s research focuses on understanding and evaluating ways to improve depression outcomes for perinatal women and their children through health care system improvement. She is currently conducting research aimed to improve the uptake of evidence-based treatments for perinatal depression in obstetric settings.


Kristina Deligiannidis, MD 

Assistant Professor of Psychiatry and Obstetrics and Gynecology

Director, Depression Specialty Clinic

Psychiatrist, Mood Disorders Comprehensive Consultation Clinic

Psychiatrist, Women’s Mental Health Specialty Clinic

Expertise: Women’s Mental Health, Depression, Psychopharmacology

Dr. Deligiannidis is Director of the Depression Specialty Clinic at UMass Memorial Medical Center and an expert in perinatal depression/anxiety. She completed her undergraduate degrees and an Honors Scholars Research Program in Neuroscience and Behavior at the University of Massachusetts at Amherst. As a recipient of NIH pre-doctoral Intramural Research Training Awards, she trained in molecular neuroendocrinology research at the NIH/National Institutes of Child Health and Human Development (NIH/NICHD). Her research was in the neural regulation of melatonin in the pineal gland. Dr. Deligiannidis completed additional research training at the National Institute of Mental Health (NIMH) and NICHD during medical school and residency. She received her medical degree from the University of Massachusetts Medical School and completed her psychiatry residency and chief residency in psychopharmacology research at UMass Medical School (UMMS)/UMass Memorial Health Care (UMMHC). Dr. Deligiannidis joined faculty at UMMS in October 2009 as an Assistant Professor of Psychiatry and is Board Certified by the American Board of Psychiatry and Neurology.  Dr. Deligiannidis is the Director of the Depression Specialty Clinic, a regional referral center at UMMHC that specializes in the evaluation and treatment of adult patients suffering from major depression, psychotic depression, treatment-resistant depression and bipolar depression.


Julia Johnson, MD

Chair and Professor, Department of Obstetrics and Gynecology

Attending Physician, UMass Memorial Medical Center

Expertise: Women’s Reproductive Health, Menopause, Hormone Therapy

Julia V. Johnson, M.D., performs research in the areas of hormonal contraceptives and coagulation risk, hormone therapy, and menopausal mental health issues. She also is interested in advancing academic career options.

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Tiffany A. Moore Simas, MD

Associate Professor of Obstetrics & Gynecology and Pediatrics

Director of Obstetrics & Gynecology Research Division

Associate Obstetrics & Gynecology Residency Program Director

Director, Obstetrics & Gynecology Resident Research

Adjunct Faculty, Graduate School of Biomedical Sciences Clinical and Population Health Research

Expertise: Women’s Reproductive Health, Pregnancy, Gestational Diabetes, Obesity in Pregnancy

Tiffany A. Moore Simas, MD, MPH, MEd, FACOG, is Associate Professor of Obstetrics & Gynecology and Pediatrics at the University of Massachusetts Medical School, and Director of the Obstetrics & Gynecology Research Division. Her core ideology is to advance the reproductive health and well-being of women, as well as their children, families and community, through evidence-based investigation. Her specific research interests and efforts are focused broadly on the pregnancy time period. Pregnancy is a very unique state of altered physiology that can act as a stress test and thus a crystal ball through which increased risks for both immediate and long-term maternal and fetal cardiometabolic conditions are uncovered and/or can be predicted. Additionally, pregnancy is often a time when women are highly motivated to engage in beneficial behavioral changes. Despite pregnancy being associated with near universal weight gain, placental production of a myriad of hormones and other soluble systemically influencing substances, only a fraction of women experience obstetric complications like preeclampsia and gestational diabetes. These pregnancy-specific diseases are associated with higher risk of lifetime cardiovascular disease, diabetes, and weight gain. Dr. Moore Simas seeks to uncover behavioral, demographic, pathophysiologic and other differences with regards to which maternal-fetal dyads will develop these conditions as compared to those that do not. An understanding of these differences will inform collaborative interventional work and potential disease mechanisms linked to their more chronic disease counterparts.