SLC2A1 and fetal growth restriction: However, Stanirowski et al. [44] examined placental abundance of SLC2A1, SLC2A3, SLC2A8, and SLC2A12 at term, in pregnancies affected by IUGR, SGA (small for gestational age), or macrosomia, and found reduced density of placental SLC2A8 only in SGA pregnancies.