IGFBP2 and fetal growth restriction: In the AGA MST (Fig 2) the variable “PLA_BP2” was connected to the variables “mRNA_BP2” (IGFBP-2 relative gene expression), “Gestational Age”, PRO μg/mg” (total protein content per mg of placental tissue) while in the IUGR MST (Fig 3) the same variable was a lateral leaf, connected to the variable “PLA_IGF2” (IGF2 placental content per mg of placental tissue).