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. She sits on the REI and Genetics Committees of the Society of Obstetricians and Gynaecologists of Canada (SOGC) and is the co-author of the Canadian guideline on preimplantation genetic testing. Her clinical and research interests include pregnancy outcomes after IVF, early pregnancy care of fertility patients, and reproductive genetics.
Having gone through IVF herself, she understands first-hand how difficult it is to need the help of a fertility clinic and to undergo treatment. She is committed to modernizing fertility care through the use of best-in-class technologies and to building a clinic that provides people with comprehensive and compassionate fertility care.
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 or spending time with her family, she’s waiting for everyone to get fully vaccinated so she can safely go to the theatre once again.
Dr. Rhonda Zwingerman (she/her)
Medical Director, Co-Founder
As the Lab Director at Twig Fertility, Christine brings to the team a diverse and multi-faceted background in fertility and reproductive biology. It is through her passion for evidence-based research and overall exposure to multiple parts of the patient journey, that Christine has meticulously designed our laboratory – incorporating best practices from leading clinics across North America, and intertwining them into workflows that take a holistic view of the entire patient experience.
Her reproductive journey started with a Master’s degree from McGill University where she studied the key factors of embryo implantation. Following her thesis work, Christine entered into the world of fertility as a clinical embryologist and over the course of her career has been part of the teams in three leading fertility clinics in Canada.
Building upon her experiences in embryology, Christine then joined Igenomix, a leading genetic testing service provider specialized in fertility and reproductive health. At Igenomix, Christine set up two laboratory sites and was responsible for overseeing Canadian operations, as well as advising physicians across the US and Canada on genetic services, including endometrial receptivity and microbiome testing.
Christine is a member of the Canadian Fertility and Andrology Society (CFAS), the European Society of Human Reproduction and Embryology (ESHRE) and the Society of Obstetricians and Gynaecologists of Canada (SOGC).
A mother to two young kids and a dog, Zoe, Christine is also a certified yoga instructor and an avid backpacking camper. She is also a PADI certified SCUBA diver and has spent time diving and studying blacktip and ragged tooth sharks, supporting research in Aliwal Shoal, South Africa.
Christine Sykas Yeh (she/her)
Michelle is a registered nurse with over 12 years experience in obstetrics, gynaecology and fertility, focused on providing the highest level of care and compassion to all patients and their families.
She completed a Bachelor of Science in Nursing at Seneca College/York University Collaborative Program, as well as a certificate in Reproductive Endocrinology and Infertility from the American Society of Reproductive Medicine and is currently earning her Masters of Nursing degree at Athabasca University. Michelle is also a member of the Canadian Fertility and Andrology Society (CFAS).
A mother of twins, Michelle also enjoys hiking, cycling, spending time outdoors, studying and playing with her kids.
Michelle Moniz (she/her)
Erin brings to Twig over ten years of experience, seven as a primary care Nurse Practitioner. She completed a Bachelor of Arts in Psychology and Women’s Studies and a Bachelor of Science in Nursing at Trent University, and a Master of Nursing at Athabasca University. Erin brings with her a deep expertise in inclusive reproductive and sexual health care serving people of all genders and sexualities.
Erin Barnes (she/her)
Dr. Daniel is a visiting physician at Twig Fertility. She earned her MD from the University of Alberta where she also pursued a five year residency in Obstetrics
and Gynaecology as well as having completed a fellowship in Reproductive Endocrinology and Infertility (REI) at Mount Sinai Hospital through the University of Toronto.
Dr. Daniel is an Assistant Professor and is involved in teaching medical students, residents, fellows, and family physicians and has an active interest in research and medical education. She comes to Twig with a shared passion for patient-centric and integrated care and joins us while she is building her own practice.
Dr. Ariana Daniel (she/her)
Reproductive Endocrinologist (REI)
Dr. Ryan Fitzpatrick is a Urologist with subspecialty fellowship training in Male Infertility and Andrology.
He completed medical school at Queen’s University, Urology residency at the University of Ottawa and Infertility Fellowship Training at the University of Toronto. He currently also works as a Urologist at Mackenzie Health. His clinical interests surround optimizing male fertility and helping maximize patients success going into any assisted reproduction treatments. He is committed to improving the societal barriers around requiring fertility care and providing complete and compassionate fertility care to all of his patients. When not in the clinic, Dr. Fitzpatrick is an avid traveler and a big Raptors fan.
Dr. Ryan Fitzpatrick (he/him)
Dr. Hossain is a fifth-year resident physician with the Department of Psychiatry at the University of Toronto. He has a career interest in the field of obsessive-compulsive and related disorders and has prior experience conducting research on issues of homelessness and access to health care.
Given his lifelong diversity of interests (his undergraduate degree was in theatre), Dr. Hossain comes to Twig with his trademark curiousity to learn, help, and grow alongside patients and their families.
Dr. Rahat Hossain (he/him)
With 10 years of experience and a background in brand building, employee engagement and experience design, Caitlin brings a new lens to fertility care in Canada and ensures everything we do at Twig is built with our patient and employees in mind.
Overseeing the end-to-end strategy and delivery of our experience, she combines data, strategy, storytelling, and operations to bring a clear voice of the patient to the table and invest and innovate in the moments that matter most.
She earned her Master’s of International Business from Queen’s University and has spent the last three years working with leading healthcare companies to make care more accessible, understandable and empowering.
An avid traveller and sports enthusiast, when she is not in our clinic she is out exploring the world, playing sports and spending time with her family and furbaby Theodore.
Caitlin Farrow (she/her)
Head of Experience
Heather (MSc, CGC, CCGC) is a certified Genetic Counsellor with 9 years of experience in a range of clinical and academic settings. She is passionate about providing supportive, patient-centred, and inclusive preconception and prenatal genetic counselling. As Twig’s in-house genetic counsellor, Heather will help you navigate your genetic testing options and results and make informed decisions that are right for your values and circumstances at every stage of your journey.
Heather earned her Master’s of Science in Genetic Counselling from the University of Toronto in 2013 and subsequently earned certification by both the Canadian and American Boards of Genetic Counselling. Heather is a member of the Canadian Fertility and Andrology Society (CFAS), the National Society of Genetic Counsellors (NSGC) including the Assisted Reproductive Technology and Infertility Special Interest Group, and the Canadian Association of Genetic Counsellors (CAGC).
When not helping patients understand genetics and what it means for them and their families, Heather prioritizes spending quality time with her own family and friends. She enjoys staying active with rock climbing and hiking, and is passionate about her volunteer work with Shelter Movers, helping survivors of abuse transition to safer lives. Heather likes to unwind by dancing, singing karaoke (badly), or reading a good book.
Heather Andrighetti (she/her)
As the Reproductive Counsellor at Twig, Elisa will support and empower patients during their fertility journeys through individual, relationship, and group checkin-ins and counselling. She fosters an anti-oppressive and trauma-informed practice founded on non-judgement, creativity, and kindness. She is experienced working with members of the LGBT2SQ+ community, with non-traditional families, and has training in group work, narrative therapy, emotionally-focused therapy (EFT), and cognitive-behavioral therapy (CBT). When not at Twig, Elisa works as a relationship and sex therapist in private practice.
Elisa is a Registered Social Worker with the Ontario College of Social Workers and Social Service Workers (OCSWSSW). She earned her Master’s in Social Work from Loyola University Chicago and is a trained advocate for survivors of sexual assault and gender-based violence. She is a member of the Ontario Association of Social Workers (OASW), Canadian Fertility and Andrology Society (CFAS), the International Association of Social Work with Groups (IASWG), and volunteers at Stella’s Place, a mental health centre for young adults in Toronto.
In her free time, Elisa is a musician who learns and performs traditional world harmony singing, old-time music, and Appalachian clogging. She is a quilter, a birder, a vacuumer of dog hair, and is working on planting a pollinator-friendly garden in her yard.
Elisa Gores (she/her)