Gross and fine motor development of preterm infants at eight and 12 months of age.

Forty-five neurologically normal preterm infants were allocated to one of two groups according to their gestational age at birth (less than 32 weeks; 32 to 36 weeks). Their gross and fine motor development was assessed at eight and 12 months chronological age and eight and 12 months adjusted age. At eight months chronological age the two groups differed significantly in both gross and fine motor development, but at eight and 12 months adjusted age and 12 months chronological age they differed significantly only in fine motor development.