Dr. Joshua Klein, MD, FACOG

Joshua U. Klein, MD, FACOG is a board-certified reproductive endocrinologist and fertility specialist in New York City. He holds academic appointment as an Assistant Professor of Obstetrics, Gynecology, and Reproductive Science at the Icahn School of Medicine at Mount Sinai.

A native of Brooklyn, Dr. Klein earned his undergraduate degree with highest honors and was a valedictorian candidate at Yeshiva University. He then pursued advanced Bible and Talmudic studies in Jerusalem, Israel, before returning to the US and pursuing his medical degree at Harvard Medical School. After earning his medical degree, he was selected for the prestigious Harvard Integrated Residency Program in Obstetrics, Gynecology, and Reproductive Biology.

In Boston, Dr. Klein trained with many world-renowned specialists at Brigham and Women's Hospital and Massachusetts General Hospital. He then chose to return to his hometown to pursue sub-specialty fellowship training in reproductive endocrinology and infertility at Columbia University Medical Center in New York City. 

Recognized as a "Top Doc" by Health magazine, Dr. Klein is an acclaimed public speaker and writer. Dr. Klein's research interests include fertility treatments for older women, the biology of reproductive aging, fertility preservation, and IVF outcomes. He has authored numerous scientific research articles and book chapters in leading medical journals and textbooks in the field of reproductive biology. He has also written widely for general audiences in publications including Health magazine, CNN.com, US News and World Report, the Boston Globe, the Huffington Post, and Livestrong.com.

Dr. Klein has a strong reputation for providing outstanding medical advice and clinical care. He is known to be highly communicative, responsive and available to patients, and deeply respectful of the sensitive nature of fertility care. He served as the Medical Director at Reproductive Medicine Associates (RMA) of New York's Brooklyn office for several years before opening his own practice in 2015.