Sex specific birthweight percentiles by gestational age for New Zealand

N Z Med J. 1994 Jan 26;107(970):1-3.


Aim: To produce sex specific percentiles by gestational age for New Zealand infants.

Methods: Gestational age (completed weeks) and birthweight (10 g multiples) was obtained for all births in New Zealand in 1990 and 1991. Outliers were identified and removed, the data was normalised at each gestational age and percentiles produced.

Results: The percentile charts were produced for gestational ages 24 to 44 weeks by sex of infant. There was an approximate difference of 100 g between male and female birthweight at all gestational ages.

Discussion: These are the first national birthweight percentile charts for New Zealand. As they may vary over time we recommend they be updated every 5 years.

MeSH terms

  • Biometry
  • Birth Weight*
  • Female
  • Gestational Age*
  • Humans
  • Infant, Newborn
  • Male
  • New Zealand
  • Sex Factors