Biparietal diameter in the Australian aboriginal fetus.

Fetal biparietal diameters (BPD) were measured by real time scanning on 657 occasions in 206 Aboriginal women attending for antenatal care in Arnhemland in the Northern Territory of Australia. Gestational age was estimated at birth for 202 of their infants and correlated with BPD measurements. Birthweights and BPD are compared with those for Aboriginal infants born in Queensland and for a Melbourne hospital population.