The Australasian Maternity Outcomes Surveillance System (AMOSS) addresses a critical need to find out more about rare, serious disorders of pregnancy and aims to provide information on:

  • Current burden
  • Provide better information on risk factors, diagnosis, management, outcomes
  • Support the translation of research findings into policy, clinical guidelines and education resources

AMOSS is a dynamic system that combines a clinical and population health approach to describe the burden of these events 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 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 rare 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.

In partnership with professional colleges and key stakeholders, study findings 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.


AMOSS was launched in 2009 against a backdrop of significant policy and structural changes in Australian maternity care.

The 2009 Report of the Maternity Services Review: Improving Maternity Services in Australia included the key recommendation:

 “…That the Australian Government, in consultation with states and territories and key stakeholders, agree and implement arrangements for consistent, comprehensive national data collection, monitoring and review, for maternal and perinatal mortality and morbidity.”

Surveillance of severe maternal morbidity is now internationally accepted as a core component in programs of maternal health  and AMOSS met a gap in reporting of this from a population health perspective:.

How AMOSS works

  • Case identification is prospective.
  • A data coordinator is nominated within each maternity unit.
  • Electronic monthly reporting on rare conditions are used with a negative reporting system in place.
  • Incidence and case-control studies are conducted.
  • De-identified data are collected on selected AMOSS conditions (known as the AMOSS data collection) via a secure web-based data survey
  • Only population level data are published. Findings are disseminated through peer-reviewed journals, presentations, the AMOSS annual report and newsletters.
  • An established national clinical reference group advises on conditions to be monitored.
  • New conditions are added on an annual basis


Current studies include: 

Completed studies include: 

Proposed studies (tbc)