IL-2 correlated positively, while IL-4 and IL-13 correlated negatively, with both Doppler indices (all P<0.05).<h4>Conclusions</h4>Pregnant women with IUGR exhibited a pro-inflammatory Th1-biased cytokine profile, characterized by increased IL-2 and decreased IL-4 and IL-13, which correlated with elevated umbilical vascular resistance. Here, IL4 is linked to fetal growth restriction.