 C Compare the body composition of VLBW newborns growing in the extrauterine environment upon reaching the corresponding term GA and weight with the body composition of term newborns, using the 3 methods DEXA, air-displacement plethysmography, and electric bioimpedance D Adjust a predictive model for body weight estimates using the parameters furnished by multi-frequency and single-frequency electric bioimpedance and anthropometry, with the measurements provided by DEXA and plethysmography as the gold standard. 