RPL19 and fetal growth restriction: Expression levels of CDKN1C relative to the endogenous RPL19 gene were 1.4 times higher in the IUGR group in a univariate analysis (IUGR RQ 0.77 ± 0.09 vs. controls 0.56 ± 0.06, Students’ t p = 0.04) (Figure 2A).