Graduate Medical Education


Obstetrics and Gynecology


Elizabeth Dierking, MD

Dr Dierking is a board-certified obstetrician and gynecologist who maintains an active clinical practice in addition to her role as the program director. She supervises the residents in all realms of their clinical practice and contributes to their research experience and didactic education.

“St. Luke’s Obstetrics & Gynecology Residency Program has a strong tradition of training excellent physicians to prepare them for their future clinical practice as a generalist or for ongoing education in a subspecialty fellowship. We teach our residents evidence-based medicine and give them the tools necessary to critically read and assess the literature to ensure they will remain up to date after residency. We also encourage them to actively participate in research so that they can help shape the future of our field.”

– Dr. Elizabeth Dierking


Israel Zighelboim, MD
Chairman of Obstetrics & Gynecology

Dr. Zighelboim is board certified in obstetrics and gynecology and gynecologic oncology and has co-authored more than 60 peer-reviewed articles and book chapters and has presented more than 40 abstracts at local, national and international scientific conferences. His scientific work has been funded by the National Cancer Institute and private foundations.

“Part of what makes St. Luke’s special, is the quality from specialty to specialty – the enthusiasm for caring for the patient, having the best, most advanced technology and having access to the best clinical trials. I always wanted to do something that would allow me to have a longer, more fulfilling relationship with my patients – at St. Luke’s I am able to do that.”

– Dr. Zighelboim



Generalists OB/GYN Physicians
Our board-certified obstetricians and gynecologists have been carefully chosen because of their teaching and mentoring abilities. They are actively involved in resident teaching at every level. The members of this group have varying interests and individual skills, ranging from high-risk general obstetrics, management of menopause, operative endoscopy and vaginal surgery, chronic pelvic pain, and medical ethics. Many serve as guest lecturers during educational time on behalf of the program.

Perinatology (Maternal and Fetal Medicine)
Six fellowship-trained maternal/fetal medicine specialists are responsible the running of the MFM rotation and providing coverage for our weekly high-risk obstetrical clinic.

Daytime coverage of the resident service on the labor floor is handled by one of our laborist physicians. Their presence and access to the residents allow for great one-on-one teaching and supervision.

Reproductive Endocrinology (REI) and Infertility
A board-certified REI who practices as part of a larger community-based infertility group serves as our section chief. She is responsible for the majority of the residents’ education on this rotation and provides them with clinical experience in reproductive endocrinology, infertility, embryology, and all types of assisted reproductive technologies. She also supervises them in the operating room and provides them with instruction on gynecologic ultrasound. Another board-certified infertility REI subspecialist on faculty supervises the residents in their REI clinic.

Urogynecology and Pelvic Reconstruction (Urogyn)
Our world-renowned faculty has been on the cutting edge of new urogynecologic procedures. Our section chief is a fellowship-trained Urogynecologist who is responsible for didactic teaching and the urogyn rotation. This third-year rotation includes time in the operating room as well as office-based care in his private office and the urogynecology clinic. He has two fellowship trained partners who contribute significantly to the residents’ education. The Allentown campus, with its advanced surgical suite, is the mainstay of our Urogynecology service.

Gynecologic Oncology (gyn onc)
Four fellowship-trained gynecologic oncologists provide a diverse educational opportunity for the residents. They provide extensive surgical experience for the residents who operate side-by-side with them during their four years of residency. The gyn onc service provides opportunities to learn comprehensive management of chemotherapeutic management, radiotherapy for gynecologic malignancy and opportunities for research projects.  Our gynecologic oncologists also provide didactic education and mentoring during the protected education time as well as our gyn oncology rotations. Their constant presence allows for easy access and consultation.

We partner with a group of board-certified and full-time neonatologists who manage our network’s Level III Neonatal Intensive Care Unit (NICU). All neonatologists participate in clinical care, neonatal resuscitation and bedside teaching, and participate in High-risk Obstetric/ Neonatal Case Conferences.

Family Planning
Our family planning training is provided in conjunction with a local private facility that provides family planning and abortion services. One of our faculty members with a special interest in family planning also provides weekly educational sessions to the residents on the rotation. Residents provide care at a complex contraception clinic offered through our Star Wellness Women’s Health Centers. Opportunities for international research rotations also exist.

Our hospital and clinics are a safe space for members of the LGBTQ community. One of our REI faculty provides care to transgender patients in the community through our Star Wellness REI clinic. Our residents are also able to gain exposure to transgender medicine during their family planning rotation.