Avner Hershlag, MD

Dr. Hershlag is dual board certified in obstetrics and gynecology and reproductive endocrinology. He is a Visiting Professor at the Renaissance School of Medicine at Stony Brook University. Dr. Hershlag is also a Professor of Obstetrics, Gynecology and Reproductive Medicine at the Donald and Barbara Zucker School of Medicine at Hofstra/Northwell. He currently serves as the Chief Medical Officer (CMO) of Modern Fertility. Dr. Hershlag served as the chief of Northwell Health Fertility between 2011-2018. He was also the program director of the fellowship program in reproductive endocrinology, which he had established.
Dr. Hershlag completed his undergraduate and graduate education training in his native country, Israel, and graduated from the Hadassah Medical School in Jerusalem. Following three years of a general surgery residency at Hadassah, Dr. Hershlag moved to the United States in 1984. In the United States, he completed his obstetrics and gynecology residency at the George Washington University Medical Center and a fellowship in reproductive endocrinology at Yale School of Medicine. His research has recently focused on the impact of genetics on infertility and the fertility preservation and prevention of cancer through genetic screening and preimplantation genetic testing (PGT). He is also invested in access to fertility care and the ethics of reproductive technologies.
Dr. Hershlag has cared for patients for more than 30 years and established successful programs at Northwell Health, including preimplantation genetic testing (PGT), egg freezing, fertility preservation for cancer patients and donor eggs (third-party reproduction). Dr. Hershlag frequently participates in international conferences. Most recently, he has organized and co-chaired the International Summit on Assisted Reproduction and Genetics (SARG) meeting in Tel Aviv, Israel (virtual in 2020) and chaired a course in preimplantation genetic testing (PGT) at the CoGen meeting in Paris, France (virtual in 2020.)
He is a past member of the board of directors of RESOLVE: The National Infertility Association. Dr. Hershlag is the author of over 75 peer-reviewed papers, over 30 book chapters, and a novel entitled Misconception. He is the recipient of several awards, including Castle Connolly's Top Doctors over the past several years and the American Society for Reproductive Medicine (ASRM) 2019 Star Award.

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