Co-founder and Medical Director of Twig Fertility, Dr. Rhonda Zwingerman is a physician and reproductive endocrinology and infertility (REI) specialist.

She completed medical school at Queen’s University, OBGYN residency at the University of Alberta, and her Masters and REI fellowship at the University of Toronto. Her clinical and research interests include endometriosis, reproductive genetics including preimplantation genetic testing, and early pregnancy care of fertility patients.

Having gone through IVF herself, she understands first-hand how difficult it is to be on a fertility journey. She is committed to modernizing fertility care through the use of best-in-class technologies and to creating clinics that bring like-minded people together to provide Canadians with the comprehensive and compassionate fertility care that they deserve.

An avid musical theatre buff, Dr. Zwingerman sits on the board of the Musical Stage Company, Canada’s leading and largest non-profit dedicated to musical theatre. When not working, spending time with her family or at the theatre, she’s planning her next theatre-related trip to NYC.

Dr. Ruth Ronn brings a wealth of experience from her work on the frontlines of fertility – both in Canada and abroad. A Royal College certified Obstetrician Gynaecologist and Reproductive Endocrinology & Infertility (REI) specialist, she is a graduate of McGill Medical School and trained in Obstetrics and Gynaecology at Queen’s University.

Dr. Ronn completed her Reproductive Endocrinology & Infertility (REI) Fellowship at Mount Sinai Hospital, University of Toronto, and received her Masters in Public Health at Johns Hopkins University. She has trained with world leaders in infertility both in Israel and in Canada and is the recipient of numerous scholarships, awards, and research grants.

Dr. Ronn has pursued a variety of research initiatives and continues to carefully follow challenges in fertility preservation and disparities in fertility care. She has published in peer reviewed medical journals, presented at national and international conferences, and has helped author the Canadian Guidelines on Fertility Preservation. She is currently working on national guidelines towards inclusive fertility care for sexual and gender minorities.

In addition to her daily practice as an infertility specialist, she is passionate about yoga, outdoor activities, and travel.

Dr. Alyson Digby is a Reproductive Endocrinology and Infertility Specialist with a dynamic background that blends science, art and well-being. Originally from coastal Halifax, Nova Scotia, she holds two Bachelor’s Degrees in Behavioural Neuroscience and Fine Arts from McGill and NSCAD, respectively. Dr. Digby attended Medical School at Dalhousie University, where she then went on to complete her residency in Obstetrics and Gynaecology. Come full circle, she returned to McGill for a Fellowship in Gynaecologic Reproductive Endocrinology and Infertility.

Amidst her formal medical training, Dr. Digby completed Akhanda Yoga Teacher Training, which deepened her perspective on the mind-body connection. Dr. Digby is unwavering in providing compassionate care, rooted in the values of her interdisciplinary learnings.

Dr. Alice Buwembo is a Reproductive Endocrinology and Infertility Specialist (REI) who joins Twig with a passion for helping people achieve their dream of conceiving. Her gentle approach focuses on empowering patients along their journey, using evidence-based medicine to provide compassionate, personalized fertility care.

Originally from Saskatchewan, Dr. Buwembo pursued her undergraduate studies in Biomedical Sciences at the University of Ottawa. She then completed a Master’s in Neuroscience at McGill University before attending medical school in Cork, Ireland. Her medical training continued with a residency in Obstetrics & Gynaecology and a fellowship in Gynaecologic Reproductive Endocrinology & Infertility, both at McMaster University.

Beyond her academic and professional pursuits, Dr. Buwembo enjoys spending quality time with her family, attending concerts, and exploring new foods and cultures through travel. She’s an avid Formula 1 fan and hopes to attend a Grand Prix at one of the iconic circuits around the world.

Dr. Argyrios (Argy) Kolokythas joins Twig as a Reproductive Endocrinology and Infertility Specialist (REI). Originally from Greece, Dr. Kolokythas earned his Medical Degree at the University of Athens, completed his Obstetrics and Gynaecology Residency in Switzerland, and pursued his Fellowship in Gynaecologic Reproductive Endocrinology and Infertility at McGill University in Montreal.

In addition to his medical training, Dr. Kolokythas holds two Master’s Degrees: an MSc in Health Economics, Policy, and Law from Erasmus University in the Netherlands, and an MSc in Evidence-Based Health Care from Oxford University in the United Kingdom.

Having lived in several countries, Dr. Kolokythas embraces the richness of diverse cultures, fostering empathy, acceptance, and open-mindedness in his approach. Passionate about building meaningful relationships with his patients, he is committed to helping individuals and couples create their families, offering compassionate, personalized care throughout their journey.

Outside of clinical life, Dr. Kolokythas enjoys traveling, playing tennis, and watching movies. A true linguaphile, he speaks Greek, English, German, French, and Italian. Always up for a challenge, whether it’s practicing a new skill, mastering a board game, or learning a new language Dr. Kolokythas views every experience as an opportunity for growth.

Dr. Ganer Herman is a Reproductive Endocrinologist and Infertility (REI) Specialist with extensive clinical and academic experience, having co-authored nearly 100 research papers in gynaecology, obstetrics and reproductive medicine.

Originally from Israel, Dr. Ganer Herman is a graduate of Ben Gurion University. She did her residency in Obstetrics and Gynaecology at the Edith Wolfson Medical Centre in Tel Aviv and practised reproductive medicine for nearly two years before completing her REI Fellowship Program at McGill University in Montreal, Quebec.

Dr. Ganer Herman is a highly regarded practitioner who is dedicated to delivering top-tier care to all patients and is passionate about helping people achieve their family building goals. When she’s not seeing patients or contributing to literature on reproductive medicine, Dr. Ganer Herman leans into artistic pursuits and is a talented pianist.