Sex specific birthweight percentiles by gestational age for New Zealand.
OBJECTIVE
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.


CONCLUSIONS
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.
Thompson
J M
JM
Department of Paediatrics, University of Auckland School of Medicine.
Mitchell
E A
EA
Borman
B
B
D001699:Biometry; D001724:Birth Weight; D005260:Female; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D009520:New Zealand; D012737:Sex Factors