TGFB1 and fetal growth restriction: For example, macrophage migration inhibitory factor (MIF) is associated with preeclampsia and fetal growth restriction (FGR), chorioamnionitis, and preterm birth; TGF-β is associated with IUGR; and RANTES is associated with preterm birth [4], but these three biomarkers were shown to be unstable in blood stored for 4 hours at 4°C [9].