The Australasian Maternity Outcomes Surveillance System (AMOSS)

The Australasian Maternity Outcomes Surveillance System (AMOSS) is an ongoing national surveillance and research system established in 2009 designed to study rare and or serious conditions in pregnancy. It is a collaborative, multidisciplinary system maintained by the National Perinatal Epidemiology and Statistics Unit in partnership with the Royal Australian College of Obstetricians and Gynaecologists, Australian College of Midwives, Society of Obstetric Medicine Australia and New Zealand and the Perinatal and Maternal Mortality Committee, New Zealand. It conducts surveillance across Australia and New Zealand; and combines a clinical and population health approach to describe the burden of selected conditions in pregnancy, childbirth and the postnatal phase. AMOSS conditions have an estimated incidence of less than 1 in 1,000 births per year. Data are collected from approximately 300 maternity units with greater than 50 births per year across Australia and New Zealand. Epidemiological investigations, including incidence and case-control studies, are conducted to provide evidence of the diagnosis, management and outcomes of selected conditions in pregnancy. The system is designed to study conditions (or interventions) based on clinical need or health priorities. Each condition is under surveillance for one year, unless otherwise specified.

The following studies have been completed since 2009: influenza in pregnancy (ICU admission), eclampsia, morbid obesity (BMI >50), placenta accreta, peripartum hysterectomy. Current studies under surveillance or in development include: antenatal pulmonary embolism, amniotic fluid embolism, rheumatic heart disease in pregnancy, gestational breast cancer, vasa praevia (Australia only) and massive obstetric haemorrhage requiring rapid blood transfusion.

In partnership with professional colleges and key stakeholders the findings from the studies will be translated into evidence-based practice. They will be used to inform policy development, clinical guidelines and educational and training resources for health providers to improve the safety and quality of maternity care in Australia and New Zealand.

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