Our Doctors




Medical Director, CEO, Founder

Dr. Merhi is the founder and the medical director of Rejuvenating Fertility Center (RFC). He is an internationally recognized fertility doctor, lecturer, editor, and grant reviewer. His training and faculty appointments included Albert Einstein College of Medicine, NYU School of Medicine, and University of Vermont. He is currently a Professor at SUNY Downstate University and Maimonides Medical Center, and the Director of the Reproductive Endocrinology and Infertility Fellowship program. He has three American Board certifications in OB/GYN, Reproductive Endocrinology and Infertility, and High-Complexity Laboratory Director (HCLD).

Dr Merhi is an active researcher with an interest in women with Low Ovarian Reserve (low AMH or high FSH), ovarian rejuvenation, gentle stimulation IVF, natural IVF, and IVF without injectables. His research also focuses on technologies, such as Ozone Sauna, that could improve egg quality especially in women with endometriosis, immune disorders, and PCOS. Dr. Merhi is also experienced in treating overweight women and those who had weight loss surgery. He is a strong proponent of the LGBTQ community and has proudly served the Arabic and Jewish Communities for over two decades.

Dr Merhi was awarded TOP OBGYN Doctor 2019 and 2020, and TOP,

Reproductive Endocrinologist and Infertility specialist by New York magazine. He received twice a Star Award from the American Society for Reproductive Medicine (ASRM). He has published over 90 manuscripts and book chapters and he continues to present his research at national and international scientific conferences. He serves as a Chair, on several committees such as the NIH, ASRM, New England Fertility Society, Society for Reproductive Investigation (SRI), and Endocrine Society.

Various media outlets have reported on his research including N.Y. Times, Washington Post, CNN, MSNBC, ABC News, NY Post, PopSugar, Glamour, POOSH, Medscape, Fox News, Hollywood Life, Mom Brain, InStyle, Parade Online, The Strategist, Healthline, Womenʼs Health, The List, Daily Mail, Best Life, and Allure. He uses his extensive research background to provide the most up-to-date medical advances in infertility treatments to his patients.




He received multiple awards for academic achievements and teaching and presented in several international conferences. He published in multiple laparoscopic, urogynecological and obstetrical journals, wrote book chapters about gynecological conditions, and served as a reviewer for several medical journals.

Dr Mouanness is a published author and expert on several fertility topics such as ovarian rejuvenation, PCOS, endometriosis, recurrent implantation failure, and impact of COVID-19 on fertility and pregnancy.

Multiple media outlets including “Healthline”, “Verywell Family”, “The Healthy”, “Popsugar”, “Giddy” and “Westport Lifestyle” have featured Dr Mouanness.


His clinical research interests include but are not limited to treatments for patients with low ovarian reserve, ovarian rejuvenation, recurrent implantation failures, fertility preservation and polycystic ovarian syndrome.



Dr. Nicole Browne is double board-certified in Reproductive Endocrinology and Infertility (REI) and in Obstetrics and Gynecology (OBGYN). She earned her medical degree from Yale School of Medicine and her bachelor’s degree from Dartmouth College. She then completed her OBGYN residency at Yale in New Haven, Connecticut, and her REI fellowship at the National Institutes of Health in Bethesda, Maryland. She has 15 years of experience in REI, and she has previously worked at New England Fertility and at Kindbody.



Dr. Carla Williams is a board-certified gynecologist and holistic women’s healthcare provider, with interest in infertility. She strives to provide patient-centered and individualized care, combining conventional and complementary medical practices. She was born and raised in New York. She attended her Obstetrics and Gynecology residency at NYC Health + Hospitals/Lincoln, affiliated with Weill Cornell Medical College, in Bronx, New York.

Dr. Williams has undergone, additional training in functional and integrative women’s health with a focus on alternative fertility therapies.



Dr. Llopiz-Valle is a board-certified gynecologist with expertise in infertility. Following her training at Yale University, she became the Director of the OBGYN Residency Program at Maimonides Medical Center in Brooklyn, New York, for 12 years.

Dr. Llopiz-Valle lives on Long Island and will work in the Jericho location. She is fluent in Spanish.