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RANZCOG New Zealand 2021 Annual Scientific Meeting
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    e-poster: The obese vs non obese mum: comparing maternal and perinatal outcomes in a provincial New Zealand hospital.

    Abstract presenter Description

    Institution: Department of Obstetric and Genecology, Hawkes Bay Hospital - Hawke's Bay, New Zealand

    Boo Marilyn   FRANZCOG Trainee, MBCHB BSC
    K Gaerty   MBChB; FRANZCOG
    E White MB ChB MRCOG;CCT (UK)

    Department of Obstetric and Gynaecology; Hawkes Bay Hospital, New Zealand  

    Objective: To evaluate the effects of class III obesity in pregnancy on maternal and perinatal outcomes.

    Design: Retrospective 12 month cohort study using the Hawkes Bay DHB maternity database to assess obstetric outcomes in obese women compared to their normal BMI counterparts.

    Method: Women with singleton pregnancies and recorded height and weight were included. Maternal outcomes of interest included gestational hypertension, gestational diabetes, mode of delivery, induction of labour, post-partum haemorrhage, wound infection. Perinatal outcomes included preterm birth, small for gestational age or large for gestational age , SCBU admissions, mechanical ventilation at birth.   

    Results: 162 women were included in the study; 81 women in the obese group and 81 women in the normal BMI group for data comparison.  Maternal obesity was associated with increased hypertension, gestation diabetes, pre-term deliveries, small for gestational age babies, large for gestational age (RR 7.17, P<0.05), admission to SCBU and need for mechanical ventilation.  It was less likely for women in the obese group to spontaneously labour compared to normal BMI group (RR 0.32, P<0.05). Obese women were more likely to have a caesarean section and less likely to have vaginal deliveries compared to women of normal BMI (RR 2.4 vs 0.4, P<0.05).

    Conclusions: Maternal obesity contributes significantly to obstetric complications, particularly in the intrapartum period. Encouraging healthier BMI pre-conceptually and effective risk management antenatally could significantly improve pregnancy outcomes.
    Marilyn is a 5th year RANZCOG trainee currently working at Christchurch Women’s Hospital as a non- training Gynaecology oncology fellow. She grew up in Auckland and went to Otago University for medical school. She is currently undertaking a Masters of Health Science at Auckland University. Her current research project includes looking at the impact of resection margins on vulvar cancer recurrence by HPV status. She enjoys good food and wine and playing with her new Spoodle puppy.