OBJECTIVE: To compare the fine motor skills of full-term small-for-gestational-age (SGA) and appropriate-for-gestational-age (AGA) infants in the third month of life. METHODS: This observational cross-sectional study enrolled 67 infants (21 SGA and 46 AGA) in the third month of life. Infants presenting genetic syndromes, congenital malformations, congenital infections and those who needed neonatal intensive care were excluded. The Bayley Scales of Infant Development-II were used, with emphasis on items that evaluate the fine motor skills. RESULTS: No differences were observed between groups for motor (p=0.21) and mental (p=0.45) scales in the third month. There was a significant difference between the groups on the item "Reaches for Suspended Ring" (Fisher's exact test; p-value=0.02): a higher percentage of SGA infants accomplished this item in the third month of life. CONCLUSIONS: We hypothesize that the difference found in the item "Reaches for Suspended Ring" could be attributed to an increased frequency of arm movements observed in SGA infants and not to a better neurodevelopment of this group.
fetal growth retardation; infant behavior; psychomotor performance; motor skills
