Mark Yudin




Dr. Mark Yudin is currently a Professor at the University of Toronto and an Active Staff Physician in the Department of Obstetrics and Gynecology at St. Michael’s Hospital. He received his medical degree from the University of Toronto, and then completed his residency training in Obstetrics and Gynecology at the University of Toronto. He then completed a two-year combined clinical and research fellowship in Reproductive Infectious Diseases at Magee-Womens Hospital and the University of Pittsburgh in Pittsburgh, PA. He also received a Master’s Degree in Clinical Research from the Graduate School of Public Health and the University of Pittsburgh. He started as active staff at St. Michael’s Hospital in 2003, and his clinical and research interests include general obstetrics and gynecology, colposcopy, and infectious diseases in women. He co-founded the Positive Pregnancy Program, a comprehensive and multidisciplinary program for the care of Human Immunodeficiency Virus (HIV)-positive pregnant women, in 2006. He is the past chair of the Infectious Diseases Committee of the Society of Obstetricians and Gynecologists of Canada (SOGC), and he is a member of the Executive Working Group of the Public Health Agency of Canada Sexually Transmitted Infections Guidelines. He has lectured and published in the area of infectious diseases in women.

His major research interests include HIV in women (including during pregnancy), pregnancy planning for couples affected by HIV, infections during pregnancy (particularly influenza and hepatitis), and sexually transmitted infections and vaginitis. He has been the recipient of many major grants in these areas, including being one of the founders of and a co-primary investigator on a Canadian Institutes of Health Research grant for The Interdisciplinary HIV Pregnancy Research Group (IHPREG). IHPREG has spearheaded the research and clinical care of HIV-affected women and men in Ontario and nationally since 2011.

Please note: Dr. Yudin is not taking any summer students.

Recent Publications

  1. Figueiro-Filho, EA, Hobson, SR, Farine, D, Yudin, MH. Highly expressed ACE-2 receptors during pregnancy: A protective factor for SARS-COV-2 infection?. Med Hypotheses. 2021;153 :110641. doi: 10.1016/j.mehy.2021.110641. PubMed PMID:34256245 PubMed Central PMC8262774.
  2. Skerritt, L, de Pokomandy, A, O'Brien, N, Sourial, N, Burchell, AN, Bartlett, G et al.. Discussing reproductive goals with healthcare providers among women living with HIV in Canada: the role of provider gender and patient comfort. Sex Reprod Health Matters. 2021;29 (1):1932702. doi: 10.1080/26410397.2021.1932702. PubMed PMID:34165395 PubMed Central PMC8231384.
  3. Kyne, LT, Yudin, MH, Bekele, T, Loutfy, M, Rourke, SB, Watson, J et al.. Understanding the Importance of Fatherhood among Men Living with HIV in Ontario. J Int Assoc Provid AIDS Care. ;20 :23259582211016133. doi: 10.1177/23259582211016133. PubMed PMID:34000889 PubMed Central PMC8135195.
  4. Loutfy, M, Tharao, W, Kazemi, M, Logie, CH, Underhill, A, O'Brien, N et al.. Development of the Canadian Women-Centred HIV Care Model Using the Knowledge-to-Action Framework. J Int Assoc Provid AIDS Care. ;20 :2325958221995612. doi: 10.1177/2325958221995612. PubMed PMID:33845677 PubMed Central PMC8047935.
  5. McClymont, E, Abenhaim, H, Albert, A, Boucoiran, I, Cassell, K, Castillo, E et al.. Canadian Surveillance of COVID-19 in Pregnancy (CANCOVID-Preg): A Rapidly Coordinated National Response Using Established Regional Infrastructures. J Obstet Gynaecol Can. 2021;43 (2):165-166. doi: 10.1016/j.jogc.2020.10.005. PubMed PMID:33546778 PubMed Central PMC8110247.
  6. Harris, K, Yudin, MH. HIV Infection in Pregnant Women: A 2020 Update. Prenat Diagn. 2020;40 (13):1715-1721. doi: 10.1002/pd.5769. PubMed PMID:33405240 .
  7. Yampolsky, M, Shlakhter, O, Deng, D, Kala, S, Walmsley, SL, Murphy, KE et al.. Exploring the impact of HIV infection and antiretroviral therapy on placenta morphology. Placenta. 2021;104 :102-109. doi: 10.1016/j.placenta.2020.12.004. PubMed PMID:33310298 .
  8. Elwood, C, Kennedy, VL, Loutfy, M, Poliquin, V, Boucoiran, I, Yudin, MH et al.. The Canadian HIV Pregnancy Planning Guidelines: What Pregnancy Care Providers Need to Know About HIV Transmission and Pre-Conception Considerations. J Obstet Gynaecol Can. 2021;43 (7):884-887. doi: 10.1016/j.jogc.2020.09.022. PubMed PMID:33272875 .
  9. Hampson, S, Rajaee, AN, Steele, D, Yudin, MH. Spontaneous Intestinal Perforation in Pregnancy from a Pre-Existing Postoperative Adhesion: A Case Report. J Obstet Gynaecol Can. 2021;43 (3):365-367. doi: 10.1016/j.jogc.2020.07.014. PubMed PMID:33051169 .
  10. Shapiro, H, Zaman, L, Kennedy, VL, Dean, N, Yudin, MH, Loutfy, M et al.. Managing and preventing blood-borne viral infection transmission in assisted reproduction: a Canadian Fertility and Andrology Society clinical practice guideline. Reprod Biomed Online. 2020;41 (2):203-216. doi: 10.1016/j.rbmo.2020.05.004. PubMed PMID:32546334 .
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Affiliations & Other Activities

  • Staff Physician, Department of Obstetrics and Gynecology, St. Michael’s Hospital
  • Professor, Department of Obstetrics and Gynecology, University of Toronto
  • Director of Clinical Research, Department of Obstetrics and Gynecology, University of Toronto