A N D O V E R
Obstetrics & Gynecology
MEET OUR TEAM
Edwin C. Radke, MD, FACOG
Dr. Radke, a Dartmouth College graduate, earned his medical degree from Case Western Reserve University School of Medicine. He completed his internship and residency at Case Western University Hospital of Cleveland. As a Fulbright Scholar, Dr. Radke is fluent in German. He has been serving the women of our valley since 1995 and serves as the medical director of our practice. He enjoys running, hiking, traveling and spending time with his family.
Thomas E. Davidson, MD, FACOG
Dr. Davidson received his medical degree from Wayne State University Medical School in Michigan. He completed his residency at the University of Illinois as well as Michael Reese Hospital in Chicago, where he won an Outstanding Achievement Award for laparoscopic surgery. Dr. Davidson is fluent in Spanish and has been serving our community since 1995. When he’s not taking care of patients, Dr. Davidson enjoys cycling, skiing and his time with family.
Andrea B. Polonsky, MD, FACOG
Dr. Polonsky has a distinguished medical academic record, earning clinical honors in perinatal care, infertility, and endocrinology. During her residency at Tufts New England Medical Center she proved herself a leader serving as administrative chief resident and receiving the Teaching Award. Dr. Polonsky graduated from the University of Pennsylvania Medical School and completed her postdoctoral work at the Department of Obstetrics and Gynecology at Tufts University Affiliated Hospitals. Her clinical interests include menopausal health, PCOS and management of abnormal menses. Dr. Polonsky has been serving our patients since 2000. She enjoys hiking, cycling, cooking and reading.
Andrea B. Rollins, MD, FACOG
Dr. Rollins graduated summa-cum-laude and earned her undergraduate degree from the University of Massachusetts. She then spent three years doing basic science research in the Infectious Diseases Division at Mass General Hospital, before moving away from New England to obtain her medical degree from the University of Virginia. She completed her internship in OB/GYN at New York Presbyterian Hospital – Cornell, and the rest of her residency in OB/GYN at Women and Infants’ Hospital of Brown University in Rhode Island. Dr. Rollins was born in Spain and lived in several countries including Germany, Austria and Colombia. She is fluent in Spanish and German and has served the community of the Merrimack Valley, North Shore and Southern New Hampshire since 2014.
Sahar Chitgar, MD, FACOG
Dr. Chitgar is a board-certified OB/GYN with specialized training in Minimally Invasive Gynecologic Surgery. She earned her medical degree and completed her residency in OB/GYN at Cook County Hospital and Northwestern University in Chicago, where she was honored with the Commitment and Excellence Award in 2012. She pursued advanced surgical training through a fellowship in Minimally Invasive Gynecologic Surgery at the State University of New York at Buffalo, and received the distinguished Intuitive Surgical Clinical Robotics Fellowship Award. Her clinical interests include complex gynecologic surgeries, management of abnormal uterine bleeding, uterine fibroids, and abnormal Pap smears. She enjoys yoga, tennis, skiing, painting, and spending time with her family. Dr. Chitgar has been serving the Merrimack Valley community since 2017.
Elise E. Saks, MD, FACOG
Dr. Saks has been serving patients at Andover Obstetrics and Gynecology since 2003. She is a graduate of Dartmouth College and the University of Pennsylvania School of Medicine. She completed her residency at the University of Rochester Medical Center, where she received the Guilford Wilson Memorial Award for excellence in patient care. While a student, she took a special interest in working at a shelter for battered women and children, as well as in public health and education. She enjoys skiing, travel, literature and pursuits with her family.
Sue Y. Kim, MD, FACOG
Dr. Kim received her undergraduate degree from Harvard and her medical degree from Columbia University College of Physicians and Surgeons. She completed her residency in obstetrics and gynecology at Washington University School of Medicine in St. Louis, where she was an administrative chief resident, received several teaching awards, and earned the achievement award in laparoscopic surgery. She is board certified in obstetrics and gynecology. Dr. Kim joined our practice in 2009.
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Ann Cerami, MPH, RN, CNM
Ann’s Bachelor’s degree in nursing is from Boston University. She earned her Certified Nursing-Midwifery degree from the State University of New York Downstate, along with a Master’s in Public Health from Hunter College. She has more than 30 years of maternal/child nursing experience and has been a midwife for more than 27 years. Ann is married with two sons, and she enjoys cooking, yard work, and outdoor activities with her family and friends.
Alexsis Walter, MSN, APRN, WHNP-BC
Alexsis received a Bachelor of Science in Nutrition-Dietetics from the University of New Hampshire, Durham NH. She received her Master of Science in Nursing from Boston College, Boston MA. Alexsis has focused her education and work experience around women’s healthcare. Her special interests include vulvar dermatology, contraceptive management, and medical nutrition therapy for the management of women's health diseases.
Jacqueline Landry, MSN, APRN, FNP-BC
Jacqueline received her Bachelor of Science in Nursing at Salem State University. She worked in acute care before obtaining her Master's degree from Simmons University. She is a board certified Family Nurse Practitioner. She is most interested in adolescent sexual health education and contraception counseling. Jacqueline is married with two children and enjoys spending time with her family in the lakes region of New Hampshire.
Katrina Gomez-Walker, MSN, APRN, FNP-C
Katrina Gomez, FNP-C, is a certified Family Nurse Practitioner and received her Masters of Science in Nursing at the University of Massachusetts Boston. She is passionate about educating and supporting mothers with perinatal mood disorders. Before becoming a Nurse Practitioner, Katrina was a labor and delivery nurse at Winchester Hospital, where she discovered her love for women’s health. Providing hands-on care and education to her patients and their partners during the labor process inspired her to continue her education, enabling her to work in an environment where she could build long-term rapport with her patients and facilitate shared decision-making. A meaningful part of Katrina’s career has been emphasizing the importance of maternal mental health throughout the antepartum period for both the patient and their support persons. She is currently pursuing a certificate in perinatal mood disorders through Postpartum Support international. Katrina is also a member of the American Academy of Nurse Practitioners.
Sarah Yanulis, MSN, APRN, FNP-BC
Sarah received her Bachelor of Science in Nursing at Boston College. She worked as a nurse in labor and delivery for over 6 years before going on to continue her education. She received her Masters of Science in Nursing from Simmons University and is a board certified Family Nurse Practitioner. During her undergraduate years, Sarah spent time living in Argentina and Ecuador, where she became fluent in Spanish. She is passionate about educating and empowering patients with health knowledge so that they may take an active role in their care. Her experience in obstetrics makes her an excellent resource for pregnant and postpartum mothers. In her free time, you’ll find Sarah on the ski slopes, hiking with her rescue pup, or on a flight to her next travel destination.