The MUM SIZE Study

  • Professor David Story

  • Project Details

    Associations between maternal size and health outcomes for women undergoing for caesarean section: a multicentre prospective observational study (The MUM SIZE Study)

    Background: The rate of obesity in women of childbearing age is increasing in high income countries. Increased BMI is thought to be related to adverse pregnancy outcomes. During pregnancy, however, BMI may naturally increase leading to incorrect classification of women according to WHO BMI categories (underweight, normal, overweight, obese and super-obese) at term and a reluctance of clinicians and researchers to use pre-pregnancy BMI categories in term pregnant women. Furthermore, the rate of caesarean section (CS) is also increasing which, when combined with increased maternal size, may contribute to adverse maternal and neonatal outcomes, increased total theatre times and increased hospital costs. There is little research in this area. The aim of this study was to investigate associations between maternal size at term and clinical, theatre utilization and health economic outcomes for women undergoing CS.

    Method: A prospective multicentre observational study was undertaken of women undergoing all categories of caesarean section. Height and weight were recorded at the initial antenatal visit and at delivery. We analysed the associations between term BMI (continuous and pregnancy specific cut-off values) and total theatre time, surgical time, anaesthesia time, maternal and neonatal adverse outcomes, total hospital admission, and theatre, costs.


    A/Prof Alicia Dennis 
    Dr Karen Lamb 
    Ms Michelle Tew
    Dr Kim Dalziel
    Prof Philip Clarke 
    Dr Joseph Lew
    Ms Anna Parker 
    Dr Elizabeth Hessian  
    A/Prof Glyn Teale
    Dr Scott Simmons 
    Dr Dan Casalaz


    Ballarat Base Hospital: Michael Shaw, Balvindar Kaur, Lucy Johnson, Gabriel Jones, Alyce Burgess

    The Mercy Hospital for Women: Scott Simmons, Katrina Pirie, Anne Galati-Laguda, Leanne Pilkington

    The Northern Hospital: Joseph Lew, Yasmin Lennie

    Goulburn Valley Health: Arnold Beeton, Gwendolyn Liow

    Sunshine Hospital: Elizabeth Hessian, Samantha Bates, Mari Kawamata, Miriam Towns, Anna Tippett, Jenny Vo

    North Eastern Hospital Wangaratta: Andrew Haughton, Ben Kabbabe

    The Royal Women’s Hospital: Alicia Dennis, Sarah Grant, Jacqueline de Gabriel, Ingrid Walkley, Hannah Barker.


    Australian and New Zealand College of Anaesthestists Clinical Trials Network Pilot Grant, 2013.

    Melbourne Medical School, The University of Melbourne, MMS Research Seed Funding Grant, 2013.

    Research Group

    About us

    Faculty Research Themes

    Child Health

    School Research Themes

    Child Health in Medicine, Integrated Critical Medicine, Women's Health

    Key Contact

    For further information about this research, please contact the research group leader.

    Department / Centre

    Medicine and Radiology

    Unit / Centre

    About us

    MDHS Research library
    Explore by researcher, school, project or topic.