LBM (A), body fat (B), and fat percentage (C) were measured in male and female weaver homozygous mice with (I/+, w/w) or without (I/−, w/w) IGF-I transgene mice at postnatal day 45 by DXEA using a PIXImus instrument. Data are expressed as means ± SEM (n= 4). *: p<0.05 compared to mean levels of homozygous weaver littermates (I/−, w/w), as assessed by student t test.