Analysis of placental lysates demonstrated no significant difference in PHD1 expression between the three groups (Figure 3A); however, PHD2 levels were increased 1.4- and 1.5-fold in the IUGR (p < 0.05) and PE (p < 0.01) groups, respectively, compared with SPT (Figure 3B). Here, EGLN1 is linked to fetal growth restriction.