MTOR and fetal growth restriction: Given the reports demonstrating placental mTOR signaling is reduced in pregnancies complicated by IUGR (Yung et al., 2008; Chen et al., 2015a; Rosario et al., 2015a; Dimasuay et al., 2017; Hung et al., 2017) and activated in placentas associated with fetal overgrowth (Jansson et al., 2013; Martino et al., 2016; Muralimanoharan et al., 2016; Sati et al., 2016; Shang and Wen, 2018), it is possible that the transcriptional regulation of placental protein translation contributes to these abnormal fetal growth phenotypes in pregnant women.