Matrix of linear correlation among the variables in the study.

IUGR: intra-uterine growth retardation; AGA: appropriate for gestational age; Gest Age: gestational age (week); PRO: total protein content per mg of placental tissue (μg/mg); mRNA_BP1: IGF Binding Protein-1 relative gene expression; mRNA_BP2: IGF Binding Protein-2 relative gene expression; mRNA_IL6: Interleukin-6 relative gene expression; mRNA_IGF1: Insulin-like growth factor-1 relative gene expression; mRNA_IGF2: Insulin-like growth factor-2 relative gene expression; PLA_IGF2: Insulin-like growth factor-2 normalized placental lysate concentration (ng/mg); PLATNF: Tumor Necrosis Factor-α normalized placental lysate concentration (ng/mg); PLAIL6: Interleukin-6 normalized placental lysate concentration (ng/mg); PLA_BP2: IGF Binding Protein-2 normalized placental lysate concentration (ng/mg). Matrix of linear correlation among the variables in the study.