1059 Body Composition of Adequate and Small for Gestational Age Newborns and the Relationship with Maternal Body Composition

Abstract

Introduction: Low birth weight and intrauterine growth restriction are associated to high morbidity and mortality. A compromised maternal nutritional status and placental failure could be responsible for intrauterine growth insufficiency.Objectives: To describe mothers' body composition of adequate for gestational age (AGA) and small for gestational age (SGA) newborn infants, and to correlate them with newborns' body composition.Methods: 19 term AGA newborns and 18 term SGA newborn were studied. Anthropometric data was registered. The body composition of mothers and their respective babies was determined by deuterium dilution and analyzed by gas isotopic ratio mass spectrometry and bioelectrical impedance analysis (BIA).Results: There was no difference in anthropometric characteristics and body composition between AGA and SGA mothers. There was a strong correlation between the two methods utilized for analysis of maternal body composition (deuterium vs BIA). Gestational age, gender distribution and Apgar score were similar between AGA and SGA babies. AGA newborns showed higher weight and length at birth and study period, as well as higher Rohrer index, cephalic, thoracic and braquial circumpherence, triciptal and subscapular skinfolds, compared to SGA newborns. There was a significant difference in body composition between AGA and SGA groups regarding fat mass (13,5% ± 4,80 AGA vs 7,01% ± 3,41 SGA) and total body water (74,4% ± 2,73 SGA vs. 68,3% ± 4,51 AGA). It was not found any significant correlation between maternal and newborn's body composition in both groups.Conclusion: Intrauterine growth restriction is not related to maternal body composition in our university hospital.