Gestational age

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​ On this page

Overview

In 2024, 91.9% of babies born in NSW were reported to be born at term (37–41 weeks gestation), 7.7% were born prematurely (less than 37 weeks gestation), and 0.4% were born post-term (42-plus weeks gestation). Of the 7.7% of babies born prematurely, 0.8% were born at less than 28 weeks, 0.7% at 28–31 weeks, and 6.2% at 32–36 weeks.

Variations in gestational age across local health districts should be interpreted with caution as maternity and neonatal service capability levels differ across districts. Women identified as being at risk of premature birth or with higher-risk pregnancies may be transferred to a hospital with a higher maternity and neonatal service capability level prior to the birth of the baby. These transfers ensure women and babies receive the safest and most appropriate care, but they can also influence differences in outcomes, including gestational age data reported for local health districts with higher interstate referrals, especially those close to the borders of the Australian Capital Territory, Victoria and Queensland.

Gestational age, babies born in NSW 2020–2024 

By number of babies

Gestational age (weeks) 2020 2021 2022 2023 2024
<28​750768734712742
28–31594598533571602
32–365,4205,8295,4445,2895,449
37–4185,12391,38484,08981,03781,308
42+616687699785329
Not stated38501355651
Total92,54199,31691,63488,45088,481

By percentage of babies

Gestational age (weeks) 2020 2021 2022 2023 2024
<280.80.80.80.80.8
28–310.60.60.60.60.7
32–365.95.95.96.06.2
37–4192.092.091.891.691.9
42+0.70.70.80.90.4
Not stated0.00.10.10.10.1
Total100.0100.0100.0100.0100.0

​Source: NSW Perinatal Data Collection (SAPHaRI). Centre for Epidemiology and Evidence, NSW Ministry of Health.​

Notes:

  • ​​Births include all liveborn and stillborn babies.
  • Women living in NSW border local health districts may give birth interstate due to personal choice, proximity to maternity care, or transfer for higher-level maternity or neonatal care. These births are not included in this report, and this may affect reported rates. For more information, refer to: Location of residence​.​​​

Data

Baby outcomes – Gestational age​

  • Gestational age, babies born in NSW 2020–2024
  • Gestational age by local health district of residence, babies born in NSW 2024
  • Gestational age by local health district of hospital, babies born in NSW 2024
  • Gestational age by maternity service capability level and hospital, babies born in NSW 2024
  • Gestational age by baby's Aboriginal status, babies born in NSW 2020–2024
  • Gestational age, Aboriginal babies by local health district of residence, babies born in NSW 2024

HealthStats NSW –  ​Duratio​n of pregnancy at birth (gestational age)

 

Current as at: Monday 18 May 2026