Bodyweight, length and head circumference of newborn infants and their relation to maternal and infant factors. Normal values for intrauterine growth.

: Means, standard deviations and smoothed percentiles of fetal weight, length and head circumference at birth, and weight of the placenta between 26 and 44 weeks of gestation are presented. The data are based on 5136 single and 208 twin, live-born newborn infants delivered at the cantonal Hospital Winterthur between 1969 and 1974. The percentile curves differ considerably from those of the widely used "Lubchenco-Curves". Fetal weight correction factors for maternal weight, parity and sex of the child are given. Among the various maternal and infantile variables influencing fetal growth, gestational age and maternal weight were found to be the most significant ones affecting weight and length of the newborn. Parity and sex of the child were of moderate, maternal height and nationality of minor importance.