The role of antenatal factors on tibial speed of sound values in newborn infants.

Objective: To evaluate the role of some antenatal factors on bone status of newborn infants.

Methods: Tibial bone speed of sound (SOS) value was measured by quantitative ultrasound within 5 days after birth in 205 neonates whose gestational ages ranged between 31 and 40 weeks. The cohort was divided into two groups according to intrauterine growth curves, as small- (SGA) and appropriate-for-gestational age (AGA).