Percival Gareth Rudee Seaward MBBCh, MMed(O&G), MSc(ClinEpi), MSc(QIPS), Dip Mid COG(SA), FCOG(SA), FSOGC
Maternal-Fetal Medicine


Mount Sinai Hospital
700 University Avenue, Room 3-907
Toronto, ON, M5G 1Z5



Clinical Interests

quality improvement and patient safety, minimally invasive fetal therapy, obstetric ultrasound

Dr. Seaward is Professor and Vice-Chair of Quality Improvement and Patient Safety in the Department of Obstetrics and Gynaecology at the University of Toronto. He is a core member of the University of Toronto Centre for Patient Safety and is cross appointed to the Institute of Health Policy, Management and Evaluation at U. of T. Dr. Seaward also serves as an Associate Medical Director, Criticall, Ontario and is an executive member of the Southern Ontario Network. He is currently a council member of the Provincial Council of Maternal Child Health of Ontario and is Co- Chair of the Maternal Newborn Committee of PCMCH.

He was the Associate Obstetrician and Gynecologist in Chief at Mount Sinai Hospital and UHN as well as the Head of the Division of Quality Improvement and Patient Safety (OB/GYN) at Mount Sinai from 2014 -2017. From 2000 to 2014 he was the Medical Director of the Labor and Delivery Unit at Mount Sinai Hospital and Head of the Division of Obstetrics from 2007 to 2014. He introduced and for 13 years was the Physician Lead and Co-Chair of the SOGC MOREOB Program at Mount Sinai Hospital. 

Dr. Seaward received his medical degree from the University of the Witwatersrand, South Africa, and went on to complete a Master of Medicine degree at Wits. He received specialty certification in Obstetrics and Gynecology from the Colleges of Medicine of South Africa and the Royal College of Physicians and Surgeons of Canada. He completed a two-year fellowship in Maternal-Fetal Medicine at the University of Toronto. He holds a Master of Science degree in Clinical Epidemiology (University of Toronto) and a Master of Science Degree in Quality Improvement and Patient Safety (University of Toronto).

Dr. Seaward’s current areas of clinical expertise and interest are in minimally invasive fetal therapy and Obstetric ultrasound. He has received numerous research and teaching awards as well as a Ministry of Health Scholarship to complete the Advanced Health Leadership Program through the University of Toronto’s Rotman School of Management. 



2010 Aug - present ~ Site Investigator. Modified Early Obstetric Warning System (MEOWS) and Collaborative Integrated Pregnancy High-dependency Estimate of Risk (CIPHER). Canadian Institute of Health Research. PI: Peter von Dadelszen. Collaborator(s): Castillo, Elaiana; Ansermino Mark; Douglas Myrtle Joanne; Lapinsky, Stephen; Magee Laura; Russell, James; Seaward Gareth; Walley Keith; Yong Paul. $100,000 CAD. 

Publications and Awards

View PubMed search of this faculty member's recent publications.

Recent Publications

Baud D, Windrim R, Van Mieghem T, Keunen J, Seaward G, Ryan G. Twin-Twin Transfusion Syndrome (TTTS): A Frequently Missed Diagnosis With Important Consequences. Ultrasound in Obstetrics & Gynecology. 2014 Feb. In Press. 

Suresh Anandakrishnan, Mrinalini Balki, Dan Farine, Gareth Seaward, Jose C.A. Carvalho. Carbetocin at elective ceasarean delivery: a randomized controlled trial to determine the effective dose, part 2. Can J Anesth. 2013 Nov;60(11):1054-1060. Canadian Anesthesiologists Society 2013

Osborn AJ, Baud D, Macarthur AJ, Propst EJ, Forte V, Blaser SM, Windrim R, Seaward G, Leimem K. Shah P, Ryan G, Campisi P. Multidisciplinary perinatal management of the compromised airway on placental support: lessons learned. Prenatal Diagn. 2013 Nov;33(11):1080-1087. 

David Baud, Andrea Lausman, Malikah A Alfaraj, Gareth Seaward, John Kingdom, Rory Windrim, Jacob C. Langer, Edmond N. Kelly and Greg Ryan. Expectant Management Compared With Elective Delivery at 37 Weeks for Gastroschisis. American Journal of Obstetrics & Gynaecology. 2013 May;121(5):990-8. 

Baud D, Windrim R, Keunen J, Kelly EN, Prakash S, van Mieghem T, Seaward PGR, Ryan G. Fetoscopic laser therapy for twin-twin transfusion syndrome before 17 and after 26 weeks gestation. Am J Obstet Gynecol. 2013 Mar;208(3):197.e1-7. 

Cordovani D, Balki M, Farine D, Seaward G, Carvalho J. Carbetocin at elective caesarean delivery: a randomized trial to determine the effective dose. Canadian Journal of Anesthesia. 2012 Aug;59(8):751-7.

Shrey S, Kelly EN, Langer JC, Davies GA, Windrim R, Seaward PG, Ryan G. Fetal thoraco-amniotic shunting for large macrocystic congenital cystic adenomatoid malformations (CCAM) of the lung. Ultrasound Obstet Gynecol. 2012 May;39(5):515-20.

Alfaraj MA, Ryan G, Langer JC, Windrim R, Seaward PG, Kingdom J. Does gastric dilation predict adverse perinatal or surgical outcome in fetuses with Gastroschisis? Ultrasound Obstet Gynaecol. 2011 Feb;37(2):202-206. 

Yinon Y, Visser J, Kelley EN, Wndrim R, Ansalem H, Seaward PG, Ryan G. Early Intra-uterine transfusion in severe red blood cell alloimmunization. Ultrasound Obstet Gynaecol. 2010 Nov;36(5):601-6. 

Yinon Y; Grisaru-Granovsky S; Chaddha V; Windrim R; Seaward PG; Kelly EN; Berezovska O; Ryan G. Perinatal outcome following fetal chest shunt insertion for pleural effusion. Ultrasound Obstet Gynaecol. 2010 Jul;36(1):59-64. 

Xu H, Perez-Cuevas R, Xiong X, Reyes H, Roy C, Julien P, Smith G, von Dadelzsen P, Leduc L, Audibert F, Moutquin JM, Piedboeuf B, Shatenstein B, Parra-Cabera S, Choquette P, Winsor S, Wood S, Benjamin A, Walker M, Helewa M, Dube J, Tawagi G, Seaward G, Ohlsson A, Magee LA, Olaturnbosum F, Gratton R, Shear R, Demaianczuk N, Collet JP, Weis s, Fraser WD INTAPP Study Group. An International Trial of Antioxidants in the Prevention of Preeclampsia (INTAPP). Am J Obstet Gynaecol. 2010 Mar;202(3):239. e10. 

Oepkes D, Seaward PGR, Vandenbussche FP, Windrim R, Kingdom J, Beyene J, Kaqnhai KK, Ryan G, DIAMOND study Group.  Doppler ultrasonography versus amniocentesis to predict fetal anemia. N Engl J Med. 2006 Jul 13;355(2):156-64.

Dukler D, Seaward PGR, Oepkes D, Windrim R, Ryan G. Non-invasive tests to predict fetal anemia: A study comparing Doppler and ultrasound parameters. Am J Obstet Gynecol 2003 May 188(5):1310-4.

Seaward, PGR; Hannah, M.E; Myhr, T.L; Farine, D;  Ohlsson, A;  Wang, E.E;  Haque, K;  Weston, J.A;  Hewson, S.A;  Ohel, G. Predictors of Chorioamnionitis & Post Partum Fever in Patients with prelabor rupture of membranes at term. Am J Obstets Gynecol 1997,177:1024-29.

Seaward, PGR; Hannah, M.E; Myhr, T.L; Farine, D;  Ohlsson, A; Wang, E.E; Haque, K; Weston, J.A;  Hewson, S.A;  Ohel, G. Predictors of Neonatal Sepsis in Patients with prelabor rupture of membranes at term. Am J Obstets Gynecol 1998;179.

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