REI Fellowship

The Icahn School of Medicine Department of Obstetrics and Gynecology Fellowship in Reproductive Endocrinology and Infertility

Make an Appointment

The Icahn School of Medicine Department of Obstetrics and Gynecology Fellowship in Reproductive Endocrinology and Infertility

The Division of Reproductive Endocrinology and Infertility at the Ichan School of Medicine at Mount Sinai is nationally recognized for its long history of scientific discovery, graduate medical education, and patient-focused compassionate care. In conjunction with the world-renowned in vitro fertilization program at Reproductive Medicine Associates of New York, the Accreditation Council for Graduate Medication Education (ACGME) accredited fellowship trains clinicians and physician-scientists in state of the art infertility and IVF treatment, advanced reproductive surgery, and cutting edge research techniques.

Under the supervision of Dr. Erkan Buyuk (Fellowship Director), the Department of Obstetrics, Gynecology, and Reproductive Science at Mount Sinai graduates fellows who go on to provide excellent medical and surgical care and who become leaders in the community and in the field. Fellows are exposed to a diverse patient population and to a diverse set of clinical and scientific experiences.


Our curriculum, based on ACOG learning objectives, provides education and training in all aspects of Reproductive Endocrinology and Infertility. This is achieved through expert led didactic lectures, journal clubs, departmental grand rounds, division meetings, research meetings, and hands on clinical, surgical, and research experiences in both REI and other divisions, including:

  • Medical Endocrinology
  • Pediatric Endocrinology
  • Genetics
  • Minimally Invasive Gynecologic Surgery

The fellows’ scientific experience is enriched through basic science research in Icahn School of Medicine’s state of the art laboratories, with a major focus on genetics and through a dedicated rotation in the embryology laboratory at Reproductive Medicine Associates of New York.

Clinical and Surgical Training

Clinical training of the fellows takes place in multiple venues during a period of 18 months. The fellows are trained in reproductive endocrinology and the art of ART by 14 board eligible or board certified reproductive endocrinologists at Mount Sinai and RMA of NY. Their training is supplemented by Medical and Pediatric Endocrinology and Genetics clinics in the respective departments. Surgical training is provided by the Faculty at REI Division and supplemented by a two-month rotation to Minimally Invasive Gynecologic Surgery Division. Surgical procedures are performed at Mount Sinai East, Mount Sinai West, and at ambulatory surgical facilities throughout the Mount Sinai Health System.


Our fellowship program dedicates eighteen months to basic and clinical science research. Fellows have access to a wide variety of clinical and basic science opportunities with faculty in our own department and in other departments at the Icahn School of Medicine at Mount Sinai. Fellows are tasked with the creation, execution, and presentation of scholarly projects. Fellows are matched with a mentor who is a subject matter expert. There is dedicated data collection and statistical analysis support available to help complete both basic and clinical scientific projects. The Program conducts weekly research meetings that include Division of Reproductive Endocrinology and Infertility faculty, data analysts, and scientists. Fellows are encouraged to assist residents with their research projects. As a result of these robust research endeavors, the division annually presents dozens of scientific abstracts nationally and internationally at scientific conferences.

Our Leadership and Faculty

Under the supervision of Doctors Alan B. Copperman (Clinical Rotation Director) and Erkan Buyuk (Fellowship Director), the fellows are trained by a dedicated group of ABOG certified/eligible Faculty invested in the well-rounded education and training of the future generation of reproductive endocrinology and infertility specialists.

Our Faculty:

Alan Copperman, MD - Clinical Rotation Director
Erkan Buyuk, MD - Fellowship Director
Tanmoy Mukherjee, MD - Laboratory Rotation Director
Daniel Stein, MD
Eric Flisser, MD
Jovana Lekovich, MD - Oncofertility Rotational Director
Kimberley Thornton, MD
Lucky Sekhon, MD
Christine Briton-Jones, PhD, HCLD- Laboratory/ Research Rotational Director
Robert Sebra, MD - Research Rotation Director
Charles Ascher-Walsh, MD - Surgery Rotation Director
Leigh Rosen, MD- Surgery Rotation Director
George Diaz, MD, PhD - Genetics Rotation Director
Christopher Romero, MD – Med/Ped Endo Rotation Director
Robert Yanagisawa, MD - Med/Ped Endo Rotation Director
Joshua Safer, MD -Transgender Health Rotational Director

How to Apply

All applications must be sent through the Electronic Residency Application Service (ERAS). Application requirements include: a completed ERAS application, official transcript from your medical school, a letter of recommendation from the Program Director, two letters of recommendation from faculty members regarding your performance on clinical clerkships, a personal statement, results of USMLE or equivalent, and licensing examinations. Candidates who accept invitations to interview receive a tour of the hospital and spend approximately five hours meeting with faculty and fellows. Due to the COVID-19 pandemic, interviews and tours are currently being performed on a virtual platform. If you have any questions or need assistance throughout the application process, please contact the Fellowship Coordinator at any time.

Application Deadline: May 1st, 2024

Get Started

It’s never too early to learn about your fertility and reproductive options.

Make An Appointment

Have questions?
We can help.

Patient-centric reproductive medicine is our specialty, and we look forward to answering any questions you may have.

Contact New Patient Concierge