To make an appointment call 604-875-2534

Our Team

Dr. Allaire, Dr. Yong, Dr. Williams

The BC Women’s Centre for Pelvic Pain & Endometriosis team:

  • Gynaecologists with special expertise in pelvic pain, endometriosis, gynaecological surgery including laparoscopic excision of endometrisosis, and other reproductive health-related issues such as infertility. Our physicians are members of the Department of Obstetrics & Gynaecology in UBC’s Faculty of Medicine. They are actively involved in the education and mentorship of gynaecologists and other community health care providers, and participate in research activities.
  • Registered Nurse with extensive experience in obstetrics, gynaecology, and reproductive health
  • Physiotherapist with extensive experience in pelvic floor dysfunction and chronic pelvic pain
  • Clinical Counsellor with extensive experience in reproductive health, chronic pelvic pain, and fertility
  • Clinical Fellow (i.e., a Gynaecologist undergoing a Clinical Fellowship training in chronic pelvic pain) with extensive experience in obstetrics and gynaecology
  • Clinic aides and administrative/booking clerks

Dr. Catherine Allaire

Dr. Catherine AllaireDr. Catherine Allaire (MD, FRCSC) is the Medical Director of the BC Women’s Centre for Pelvic Pain & Endometriosis and has been with the program since it began in 2011. Dr. Allaire is a gynaecologist with special expertise in endometriosis, pelvic pain, and surgical education. A member of the UBC Division of Reproductive Endocrinology and Infertility (REI), Dr. Allaire was one of the first in Canada to adopt minimally invasive surgical techniques for the treatment of gynaecologic problems, such as laparoscopic hysterectomy and laparoscopic excision of complex endometriosis.

Dr. Allaire graduated with honours from McGill University in 1990. She moved to Vancouver to follow her passions and to pursue specialty training in Obstetrics & Gynecology at University of British Columbia. After completing her Residency in 1995, she then completed a Fellowship in Minimally Invasive Surgery (MIS) at Baylor College of Medicine in Texas.

Dr. Allaire is Clinical Professor at UBC Department of Obstetrics & Gynaecology, Division of Gynaecologic Specialties and in the Division of Reproductive Endocrinology and Infertility (REI). She is the creator and director of the MIS rotation, is the Director of the UBC Fellowship in Endometriosis, Pelvic Pain, and Advanced Laparoscopy, and is known across Canada and internationally as a teacher and mentor in MIS.

Dr. Allaire is active in research related to gynaecology and pelvic pain including the creation of the WERF EPHect Tools. As a member of the Society of Obstetricians & Gynecologists of Canada, Dr. Allaire has participated in creating national guidelines such as the 2005 Consensus Guidelines for the Management of Chronic Pelvic Pain, Part 1 and Part 2, and the 2010 Endometriosis: Diagnosis and Management Guidelines. She was recently one of the invited participants in the worldwide 2013 Consensus on Current Management of Endometriosis.

Dr. Christina Williams

Dr. Christina WilliamsDr. Christina Williams (MD, FRCSC) is a Gynaecologist at the BC Women’s Centre for Pelvic Pain & Endometriosis. Dr. Williams was born in Barcelona, Spain where she graduated from University of Barcelona in 1981. Dr. Williams completed her Residency in Obstetrics & Gynecology in 1987 at University of British Columbia. During the 8 years she served as an Obstetrician/Gynecologist in Langley, she developed a strong interest in assisting women with chronic pain and  endometriosis-related infertility.

Since completing a Fellowship in Reproductive Endocrinology and Infertility at the University of British Columbia in 1998, Dr, Williams has served as a member of the Division of Reproductive Endocrinology and Infertility (REI) and Medical Director of the BC Women’s Centre for Reproductive Health. Through Dr. Williams’ advocacy efforts, the interdisciplinary Centre for Pelvic Pain & Endometriosis was created in 2011.

Dr. Williams’ practice involves helping women with pelvic pain, endometriosis, infertility, menstrual disorders, fibroids, and recurrent pregnancy loss. Her expertise is in pelvic ultrasound and advanced surgical management of gynecological conditions, such as laparoscopic removal of fibroids, laparoscopic excision of complex endometriosis, and laparoscopic hysterectomy.

As Clinical Associate Professor in the UBC Department of Obstetrics & Gynaecology, Division of Gynaecologic Specialties, Dr. Williams is an active clinical and surgical teacher of residents and fellows. She devotes a large portion of her practice to research in the diagnosis and management of chronic pelvic pain and endometriosis.

Dr. Paul Yong

Dr. Paul YongDr. Paul Yong (MD, PhD, FRCSC) is a Gynaecologist at the BC Women’s Centre for Pelvic Pain & Endometriosis and has been with the program since it began in 2011. Dr. Yong’s clinical practice is focused on pelvic pain, with a particular interest in endometriosis, painful periods, sexual pain, co-existing bladder and bowel problems, and pain related to the musculoskeletal system. His surgical interests include laparoscopic excision of complex endometriosis and prevention of adhesions in women with endometriosis and pelvic pain/infertility.

Dr. Yong completed a MD/PhD degree in Experimental Medicine and a Residency in Obstetrics & Gynaecology, followed by a Clinical Fellowship in Endometriosis, Pelvic Pain, & Advanced Laparoscopy in 2012, at the University of British Columbia.

Dr. Yong directs the Research Program at the BC Women’s Centre for Pelvic Pain & Endometriosis. His clinical research interests are in endometriosis and pelvic pain, and his translational research interests include bio-banking of endometriosis, gene sequencing in endometriosis, and investigating nerve formation in the pelvis as a cause of pain. Dr. Yong is also involved in teaching and is Assistant Professor in the UBC Department of Obstetrics & Gynaecology, Division of Gynaecologic Specialties.

Dr. Shannon Reid

Dr. Shannon Reid (MBBS, FRANZCOG) is completing a one year clinical fellowship with the University of British Columbia in Endometriosis, Pelvic Pain & Advanced Laparoscopy at BC Women’s Centre for Pelvic Pain & Endometriosis. Dr. Reid completed an Honours degree in Medicine at the University of Sydney, Australia, in 2004.  She then completed her Obstetrics and Gynaecology specialist training in Australia, and is a Fellow of the Australian and New Zealand College of Obstetricians and Gynaecologists.  Dr. Reid is currently pursuing a PhD and her research focuses on the use of pre-operative specialized ultrasound for the prediction of endometriosis in women with pelvic pain.

Catherine Maurer

Catherine Maurer, Registered NurseCatherine Maurer (BScN, RN) is a Registered Nurse at BC Women’s Centre for Pelvic Pain & Endometriosis and has been with the program since it began in 2011. Catherine completed her nurse training at the Middlesex Hospital in London and her training as a midwife at the Bristol Maternity Hospital in the UK. Since moving to Canada in 1985, Catherine has worked in several areas at BC Women’s Hospital & Health Centre including Maternity Services, Recurrent Pregnancy Loss, Early Pregnancy Assessment, and Reproductive Endocrinology & Infertility (REI/IVF), and Pelvic Pain. Catherine is passionate about supporting women and their families to overcome challenges and barriers to their healthcare needs.

Susannah Britnell

Susannah Britnell, Registered PhysiotherapistSusannah Britnell (BScHonsPT, FCAMT) is a Registered Physiotherapist at the BC Women’s Centre for Pelvic Pain & Endometriosis and has been with the program since it began in 2011. Susannah provides assessment and treatment for pelvic pain conditions such as pelvic floor dysfunction, pelvic girdle pain, vulvar and vaginal pain, bladder and bowel dysfunction, and chronic pelvic pain/endometriosis. Susannah has worked as a physiotherapist since 1997, both in Canada and the UK.

Susannah is a member of the Canadian Physiotherapy Association and the International Pelvic Pain Society. She is a Fellow of the Canadian Academy of Manipulative Therapy, and is in good standing with the College of Physical Therapists of BC. Susannah has a Bachelor of Science (Honours) degree from Manchester University in the UK, a Diploma of Advanced Manual and Manipulative Therapy, and a certificate in Gunn IMS. She has completed postgraduate courses in pain bio-physiology, orthopaedics, pelvic girdle pain, incontinence, and pelvic floor dysfunction. Susannah is a guest lecturer of Obstetrics in the Master of Physiotherapy program at the University of British Columbia. Susannah is a co-instructor with Dutch physiotherapist Cecile Röst, teaching postgraduate courses to physiotherapists in North America in Rost Therapy for pelvic girdle pain (PGP).

Holly Yager

Holly Yager, Registered Clinical CounsellorHolly Yager (MEd, RCC, CCC) is a Clinical Counsellor at the BC Women’s Centre for Pelvic Pain & Endometriosis and has been with the program since it began in 2011. Holly has provided therapy to women, couples, and groups for over 10 years. Her primary area of focus is reproductive health, which includes chronic pelvic pain, infertility, pregnancy loss, reproductive decision-making, sexual health, PMDD, and perinatal/postpartum mood disorders. She also treats anxiety, depression, grief/loss, trauma, and relationship concerns. She uses a variety of psychotherapies including mindfulness-based cognitive therapy, cognitive behavioural therapy, EMDR, and clinical hypnosis.

Holly has worked as a counsellor at BC Women’s Hospital & Health Centre since 2004 in the departments of Reproductive Endocrinology & Infertility (REI/IVF), Pelvic Pain, Recurrent/Early Pregnancy Loss, Specialized Women’s Health, Birthing/Best Births, and Heart Health. She has a Master’s degree in Counselling Psychology from University of British Columbia and  is both a Registered Clinical Counsellor and a Canadian Certified Counsellor. Holly is an active member of the American Society for Reproductive Medicine, the Canadian Fertility & Andrology SocietyPainBC, and the International Pelvic Pain Society. She currently shares her time between BC Women’s Hospital and private practice in Vancouver, BC.


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  • FAQs

    Q: What is endometriosis?
    A: The lining of the uterus is called the endometrium. A menstrual period occurs when the lining is shed approximately every 28 days (unless a pregnancy has occurred). A woman is diagnosed with endometriosis when endometrial tissue has begun to grow in areas of the abdominal cavity where it is not supposed to be. For more information click on Patient Information/Endometriosis: An Overview.

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