Obstetrics & Maternal Newborn Investigations (OMNI)
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Leadership
The OMNI Research Group was established by Dr. Mark Walker and Dr. Shi Wu Wen. With collaborations in 81 centres in more than 12 countries, OMNI is now a leading health services and clinical trials group in maternal newborn health and the team as a whole is well-recognized for their research accomplishments.
Mark Walker
Senior Scientist, Acute Care Research
Shi Wu Wen
Senior Scientist, Methodological and Implementation Research
Darine El-Chaar
Scientist, Inflammation and Chronic Disease
Steven Hawken
Senior Scientist, Methodological and Implementation Research
Ruth Rennicks White, BScN, RN
OMNI Senior Program Manager
Acute Care Research Program, Ottawa Hospital Research Institute
Department of Obstetrics, Gynecology & Newborn Care, The Ottawa Hospital
Ruth has an extensive background of in obstetrical nursing, business management and clinical research. As an Owner and Director of Birthcare, Inc for 10 years, she provided maternal newborn care outpatient services in the Ottawa-Carleton region. She was instrumental in establishing policies and procedures with the Senior Management Team for the Clinical Epidemiology Program at the OHRI from 2002-2005 and privacy requirements at The Ottawa Hospital/OHRI from 2002-2004. Ruth has also been the Acting Scientific Manager for BORN Ontario and the Manager of Operations for the mHealth program and the CANImmunize App at The Ottawa Hospital.
In addition to her current role as Senior Research Program Manager of the OMNI Research Group since 2000, she is the Research Operations Manager for the Department of Obstetrics, Gynecology and Newborn Care at The Ottawa Hospital. Ruth brings invaluable international experience, content expertise, clinical guidance and mentorship to the research program and to the team members, and is instrumental in the development, implementation and execution of protocols, contract negotiation and managing the fiscal aspects of the group.
Research Team
We have a highly productive, multi-disciplinary team that includes maternal-fetal medicine specialists, biostatisticians, epidemiologists and data analysts, project managers, and research coordinators.
Robin Ducharme, MSc
Senior Clinical Research Associate
Acute Care Research Program, Ottawa Hospital Research Institute
Robin received her Master of Science (MSc) in Epidemiology from the University of Ottawa in 2014. She garnered several years of research coordination experience both before and after her graduate studies. After the completion her graduate studies, Robin worked as a Methodologist at the Ottawa satellite of ICES for 5 years. She has developed expertise in a broad range of analytical methods in epidemiology and biostatistics, as well as expertise in a variety of research skills ranging from project management and coordination to large data manipulation and analysis. She has a particular research interest in maternal and newborn health.
Sandra Dunn, RN, PhD
Senior Clinical Research Associate and Adjunct Professor
Acute Care Research Program, Ottawa Hospital Research Institute
BORN Ontario, Children’s Hospital of Eastern Ontario (CHEO)
CHEO Research Institute
School of Nursing, University of Ottawa
Sandra earned her Bachelor of Nursing Science degree at Queens University, her Master of Education, and Master Science in Nursing degrees, and her Doctorate in Nursing at the University of Ottawa. In her role as Knowledge Translation Specialist for the Better Outcomes Registry & Network (BORN Ontario) she was involved in the development and implementation of an audit and feedback system (the Maternal Newborn Dashboard) designed to facilitate use of BORN data for quality improvement in hospitals providing maternal newborn care.
In addition to her current role as Senior Clinical Research Associate at OMNI, Sandra works with the IKTRN group at OHRI. She is also collaborating with an international group of clinical and knowledge translation experts to develop an Implementation Toolkit to support uptake of the WHO 2018 Intrapartum Care Guidelines. Sandra has an Adjunct affiliation with the School of Nursing, University of Ottawa. She has been involved in a number of research projects and published on topics related to: interprofessional shared decision making, decision coaching, breastfeeding, newborn pain management, shared decision making during antenatal counselling for extreme preterm birth, data quality assessment, clinical dashboard development and use of audit and feedback for quality improvement in hospital settings.
Nicki El-Bouchi, BSc
Clinical Research Assistant
Acute Care Research Program, Ottawa Hospital Research Institute
Nicki graduated from the University of Ottawa with an Honours Bachelor of Health Science, minor in Life Science and specialization in Population and Public Health. During her studies she completed a research project exploring the experiences of pregnant women obtaining prenatal, delivery, and postnatal care in Ontario during the COVID-19 pandemic. She is currently completing her Master’s of Science in Interdisciplinary Health Sciences exploring the experiences of adolescents in Ontario accessing emergency contraceptives.
She also gained valuable experience in her previous role as a Clinical Research Assistant with the Division of Orthopaedic Surgery, where she contributed to the Continuous Quality Improvement Program which focused on patient reported outcome measures to improve treatments and patient experiences. Nicki is excited for the opportunities of growth and learning at OMNI and to pursue her passions for maternal and newborn health!
Maryam Ghiasi, DDS, MSc
Clinical Research Associate
Acute Care Research Program, Ottawa Hospital Research Institute
Maryam holds a Doctorate in Dentistry from Tehran University and completed her MSc in Epidemiology at the University of Ottawa in January 2022. After graduation, she has been working as a Senior Clinical Research Assistant in the Blueprint team at OHRI coordinating several Systematic Review projects and developing expertise in various analytic methods in epidemiology. She joined OMNI as a Clinical Research Associate in 2023. She is excited to be a part of OMNI and actively contributes to various projects, helping her enhance her research skills.
Before starting her MSc Epidemiology degree, Maryam has been working clinically and also as an educator at Community Oral Health Department at Tehran University.
Kimberly Grattan, MA
Senior Clinical Research Coordinator
Acute Care Research Program, Ottawa Hospital Research Institute
Kimberly holds a Master of Arts in Applied Health Science (Brock University 2009) and Honours Bachelor of Kinesiology (Brock University 2007). Kimberly has extensive experience in the research environment working as a clinical research coordinator (University of Ottawa, Faculty of Health Science), and a research coordinator and research assistant (Children’s Hospital of Eastern Ontario Research Institute in the Healthy Active Living and Obesity research group). Ms. Grattan’s most recent role was at the University of Ottawa Heart Institute as a project manager in the Department of Cardiac Prevention and Rehabilitation, Ottawa Model for Smoking Cessation.
Notable projects that Kimberly managed prior to joining the OMNI group, was SmartMoms-Canada (PHAC), an app-based pregnancy intervention aimed at improving the health of both mother and baby by adhering to recommended gestational weight gain guidelines and the Activity Begins in Childhood trial (CIHR), a RCT examining the role of a physical activity daycare intervention on health outcomes in preschool-aged children.
Kimberly is passionate about health promotion and motivation for healthy lifestyle behaviours. She is mother to Alice, her active toddler and is proudly contributing to the health and wellness of women and children through coordinating various research projects for OMNI.
Brett Knapper, RN, MScN
Senior Clinical Research Coordinator and Nurse
Acute Care Research Program, Ottawa Hospital Research Institute
Brett Aston is originally from Southwestern Ontario. However, she received her Master’s of Science in Nursing at the University of Ottawa in 2021. During graduate school, she studied substance use in pregnancy and nurse-patient therapeutic relationships. Brett has also worked as a Registered Nurse since 2017. She has practiced in Neonatal Intensive Care Units in both London and Ottawa, Ontario.
Brett joined the OMNI team as a Clinical Research Nurse. Within this role, she assists in participant recruitment, research coordination, and sample collection. Brett is excited to use her clinical experience to facilitate Maternal/Newborn research and advance her career within the OMNI research group.
Malia Murphy, PhD
Senior Clinical Research Associate
Acute Care Research Program, Ottawa Hospital Research Institute
Malia has a PhD in Anatomy and Cell Biology from Queen’s University and completed a post-doctoral fellowship in the Department of Obstetrics and Gynecology at the Kingston Health Science Research Centre. Her graduate and post-doctoral research focused on hypertensive disorders of pregnancy and women’s cardiovascular health, and involved supporting research initiatives conducted through the Postpartum Maternal Health Clinic; a clinic designed to support cardiovascular screening and education of women who have experienced hypertensive or metabolic complications in pregnancy.
Before joining the OMNI team in April 2019, Malia was the Academic Program Lead for The Ottawa Hospital mHealth Lab where she managed several maternal-child big data and global health innovation projects funded by the Bill & Melinda Gates Foundation. At OMNI, Malia is heavily involved in the Substance use, COVID-19, and C-section research portfolios among others. In her role, she contributes to study conceptualization and development, scientific writing of manuscripts and research funding applications, and overseeing the patient partner program.
Dariana Primera
Clinical Research Coordinator
Acute Care Research Program, Ottawa Hospital Research Institute
Dariana Primera is originally from Venezuela where she received her International Medical degree and her Obstetric and Gynecologist Specialist Degree at the Universidad Central De Venezuela. When she move to Canada, she earned her Bachelor of Nursing Science degree at Memorial University of Newfoundland in 2018.
Before joining the OMNI team in December 2025, Dariana garnered several years of hands-on experience in clinical research working both in St. John’s, Newfoundland and Ottawa, Ontario.
As a Clinical Research Coordinator, she brings a comprehensive and practical understanding of the responsibilities involved in supporting high-quality clinical trials. She is eager to apply her research and clinical experience to support maternal and newborn research and further her professional growth within the OMNI research group.
Serine Ramlawi, MSc
Clinical Research Associate
Acute Care Research Program, Ottawa Hospital Research Institute
Serine graduated from Carleton University with a Master’s degree in Chemistry with a concentration in Food Science in December 2020, where she specialized in food chemistry and microbiology research.
Upon graduation, Serine was hired at Carleton University to teach the first year course: “Introduction to Food Science”. She joined OMNI team in early 2021 and she is excited to pursue a research career in maternal and fetal health.
Sara C.S. Souza, MSc
Senior Clinical Research Associate
Acute Care Research Program, Ottawa Hospital Research Institute
Sara has a MSc in Human Kinetics from University of Ottawa (2021). During her graduate studies, she was involved in different research projects focused on pregnancy, gestational weight gain, and women’s lifestyle. Combined, her research has contributed to identify and target potential factors associated with discordant gestational weight gain and healthy behaviours.
Prior to coming to Canada for her MSc, Sara received her Medical Degree from State University of Londrina, Brazil (2018). Sara’s role at OMNI involves engagement in different projects looking at maternal-fetal health and pregnancy outcomes. Working with the OMNI team, she has contributed to diverse stages of research from conception to implementation. Sara is passionate about transforming research into KT strategies and is always looking for opportunities to collaborate in Women’s Health Research.
Karishma Tailor, BSc
Clinical Research Assistant
Acute Care Research Program, Ottawa Hospital Research Institute
Karishma graduated from the University of Ottawa with Honors Bachelor of Science in Biomedical Sciences. During her studies, Karishma was involved in various research projects focused on renal health and COVID-19, while also holding previous employment and volunteer work in maternal and fetal health.
With a background in communications and interest in medicine, Karishma joined the OMNI team upon graduation. At OMNI, Karishma is involved in the Substance Use in Pregnancy research program and contributes heavily to knowledge translation initiatives. Karishma is excited to be at OMNI, and the opportunities for growth and learning.
Heather Walker
Clinical Research Associate
Acute Care Research Program, Ottawa Hospital Research Institute
Heather Walker completed her degree at McGill University and initially worked as a labor and delivery nurse and community nurse. However, her interest shifted towards data-driven solutions, leading her to complete an MSc in Epidemiology at Université de Montréal, focusing on programming and data-analysis. During her studies, Heather served as a Research Coordinator and gained experience contributing to research projects with Dr. Kate Zinszer. At the same time, while writing her thesis, Heather gained proficiency in various modeling techniques, including time series analysis, generalized additive mixed models, DLNM (Distributed Lag Non-linear Models), spatio-temporal modeling, and a range of machine learning approaches.
She later became a statistical programmer, specializing in data analysis for pharmaceutical research. Now, Heather is happy to be part of the OMNI group, where she applies her expertise in study design, statistics, and data analysis to contribute to clinical research in the field of maternal-child health.
Trainees & Graduate Students
Hailey Crosby
MSc Candidate (September 2025 – Present)
OMNI Supervisors: Dr. Darine El-Chaâr
Hailey Crosby is an MSc Epidemiology and Applied Health Research student at the University of Ottawa working under the supervision of Dr. Darine El-Chaâr. She graduated from the Honours Bachelor of Health Sciences program at the University of Ottawa and completed her honour’s thesis with Dr. Julian Little. Her thesis looked at the variation in folate status as assessed by red blood cell folate among Canadian women of reproductive age by socioeconomic and personal factors. For her Masters, she will be working on determining the association between obstetrical and perinatal outcomes following RSVpreF vaccination in pregnant individuals. She will also be exploring the burden of RSV infection and its associated outcomes among pregnant individuals, and preforming a cost- effectiveness analysis on an RSVpreF vaccination program compared to other protection methods like nirsevimab in reducing medically attended RSV infections in infants.