Home / Staff / Experts Dr. Mark P. Leondires, MD By Jessica D'Argenio Waller, MS, CNS, LDN January 9, 2023 Mark Leondires, MD is a reproductive endocrinologist and OB/GYN who founded fertility practice Illume Fertility and Gay Parents To Be, the leading international fertility program serving the LGBTQIA+ community. Dr. Leondires attended medical school at the University of Vermont, completed his residency in Obstetrics and Gynecology at Maine Medical Center, and completed his fellowship in Reproductive Endocrinology and Infertility at the National Institutes of Health. Dr. Leondires believes that every patient deserves inclusive, expert fertility care. As a father via surrogacy himself, he combines his personal and professional experience to provide high-quality, compassionate care to all. You can learn more about Dr. Leondires and his work by visiting illumefertility.com and gayparentstobe.com or following @illumefertility and @gayparentstobe.