Australian Institute of Health and Welfare (2020) Stillbirths and neonatal deaths in Australia , AIHW, Australian Government, accessed 09 February 2023.
Australian Institute of Health and Welfare. (2020). Stillbirths and neonatal deaths in Australia . Retrieved from https://www.aihw.gov.au/reports/mothers-babies/stillbirths-and-neonatal-deaths-in-australia
Stillbirths and neonatal deaths in Australia . Australian Institute of Health and Welfare, 14 December 2020, https://www.aihw.gov.au/reports/mothers-babies/stillbirths-and-neonatal-deaths-in-australia
Australian Institute of Health and Welfare. Stillbirths and neonatal deaths in Australia [Internet]. Canberra: Australian Institute of Health and Welfare, 2020 [cited 2023 Feb. 9]. Available from: https://www.aihw.gov.au/reports/mothers-babies/stillbirths-and-neonatal-deaths-in-australia
Australian Institute of Health and Welfare (AIHW) 2020, Stillbirths and neonatal deaths in Australia , viewed 9 February 2023, https://www.aihw.gov.au/reports/mothers-babies/stillbirths-and-neonatal-deaths-in-australia
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Various definitions are used for reporting and registering perinatal deaths in Australia. The National Perinatal Mortality Data Collection (NPMDC) collects data and reports using the following definitions:
Stillbirth: a fetal death prior to birth of a baby of 20 or more completed weeks of gestation or of 400 grams or more birthweight.
Neonatal death: the death of a live born baby of 20 or more completed weeks of gestation or of 400 grams or more birthweight within 28 days of birth.
Perinatal death: stillbirth or neonatal death of a baby of 20 or more completed weeks of gestation or of 400 grams or more birthweight.
Antepartum stillbirth: fetal death occurring prior to labour and/or birth.
Intrapartum stillbirth: fetal death occurring during labour and/or birth.
Very early neonatal death: death of a live born baby within the first 24 hours after birth.
Early neonatal death: death of a live born within 1–7 days after birth.
Late neonatal death: death of a live born within 8–28 days after birth.
Live birth: the birth of a baby who shows signs of life such as voluntary muscle movement, pulsating of the umbilical cord or presence of a heartbeat at birth, regardless of whether the placenta is still attached or the umbilical cord has been cut.
Terminations of pregnancy performed at 20 or more weeks of gestation may be included and recorded either as stillbirths or, in the unlikely event of showing evidence of life, as live births. There are variations in legislation regarding termination of pregnancy between states and territories, and recording of terminations is likely to be incomplete.
To allow for international comparisons, the WHO recommendation regarding perinatal mortality indicators, taken from the Global reference list of 100 core health indicators, 2015 has been used. The indicators define stillbirths as all fetal deaths of a baby born at 28 weeks' gestation or more, and/or weighing 1,000 grams or more. The indicators define neonatal deaths as all registered deaths in the first 28 days of life. In Australia, registered deaths are those born at 20 weeks' gestation or more, and/or weighing 400 grams or more.
The Perinatal Society of Australia and New Zealand (PSANZ) Perinatal Mortality Classification System is used in Australia and New Zealand to classify the causes of stillbirths and neonatal deaths. It includes the PSANZ Perinatal Death Classification (PSANZ-PDC) and PSANZ Neonatal Death Classification (PSANZ-NDC). The PSANZ-PDC system classifies all perinatal deaths by the single most important factor seen as the antecedent cause of death. In addition, for neonatal deaths, the PSANZ-NDC system is used to identify conditions occurring in the neonatal period which resulted in the death.
The PSANZ Perinatal Death Classification is an integral part of the PSANZ Perinatal Mortality Guidelines, developed for optimal standards in investigating, classifying and auditing of perinatal deaths.
The National Perinatal Mortality Data Collection (NPMDC) collects data on causes of death that have been classified according to the PSANZ Perinatal Mortality Classification System, version 2.2. The classification is recorded as part of each state and territory’s perinatal mortality review process following completion of investigations and at the end of a multi-disciplinary review of the perinatal death.
The other classification system used in Australia to classify perinatal deaths is the International Statistical Classification of Diseases and Related Health Problems, Tenth Revision (ICD-10). This classification system is based on the registered cause/s of death on the Medical Certificate of Cause of Perinatal Death, assigned by the treating medical practitioner shortly after death without access to any subsequent investigations.
The National Maternal and Perinatal Mortality Clinical Expert Group (NMPMCEG) (formerly the National Maternal and Perinatal Mortality Advisory Group (NMPMAG)) has concluded that the PSANZ-PDC and PSANZ-NDC classifications are the most appropriate for national reviews. The ICD classification of cause of death has not been included in this report.
These are the 11 high-level groups used in reporting:
Congenital anomaly: deaths in which a congenital anomaly in the baby (whether structural, functional or chromosomal) is considered to have been of major importance in the cause of the death.
Perinatal infection: primary infections occurring in term and preterm neonatal and fetal deaths and secondary infections in term infants (such as Group B Streptococcus and Cytomegalovirus).
Hypertension: deaths where a hypertensive disorder in the baby's mother, such as pre-eclampsia or pre-existing high blood pressure, is considered to have led to the death.
Antepartum haemorrhage: all perinatal deaths where the primary factor leading to the death was bleeding from the placental bed in the woman’s uterus.
Maternal conditions: deaths where a medical condition (e.g. diabetes) or a surgical condition (e.g. appendicitis) or an injury in the mother (including complications or treatment of that condition) is the cause.
Specific perinatal conditions: deaths of normally formed, appropriately grown babies, in which a specific perinatal condition, such as cord entanglement or a blood group incompatibility, was the main underlying cause.
Hypoxic peripartum deaths: deaths from acute or chronic inadequate oxygen supply from the placenta of normally formed babies, typically of >24 weeks gestation or >600 grams birthweight.
Fetal Growth Restriction: deaths of babies that were significantly low birthweight for their gestational age or where repeated antenatal ultrasound measurements had shown poor or absent growth before death.
Spontaneous preterm: deaths of normally formed, appropriately grown preterm babies following spontaneous onset of preterm labour or spontaneous rupture of membranes, irrespective of whether labour was subsequently induced and mode of delivery.
Unexplained antepartum death: deaths of normally formed fetuses prior to the onset of labour where no predisposing factors are considered likely to have caused the death.
No obstetric antecedent: includes Sudden Infant Death Syndrome (SIDS), postnatally acquired infection (such as Newborn Intensive Care Unit-acquired septicaemia from an intravenous line), accidental asphyxiation and other accidents, poisoning or violence.
The PSANZ-NDC classification system is applied only to neonatal deaths and classifies them by the most significant condition present in the baby, in the neonatal period, leading to the death.
Extreme prematurity: neonatal death in infants deemed too immature for resuscitation or continued life support beyond the delivery room (typically infants of gestational age ≤24 weeks or birthweight ≤600 grams).
Cardio-respiratory disorders: neonatal deaths in which a cardio-respiratory condition (such as respiratory distress syndrome or meconium aspiration syndrome) is considered to have been the major contributor to the death.
Infection: neonatal deaths in which infection is considered to have been the major contributor (such as early onset Group B Streptococcus sepsis, pneumonia).
Neurological: neonatal deaths in which asphyxial brain damage (hypoxic ischaemic encephalopathy) or intracranial haemorrhage was considered to have been the major contributor.
Gastrointestinal: primarily includes neonatal deaths related to necrotizing enterocolitis (a medical condition where a portion of the bowel dies).
Other: includes Sudden Infant Death Syndrome (SIDS), multisystem failure, trauma and treatment complications.
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