Flow cytometry analysis revealed no difference in the ratio of CD31+ to CD146+ staining on CD45− viable ECFCs from control (CTRL, n = 4) and IUGR (n = 4) rats (mean (%) ± SEM): 40.83 ± 14.77 vs. 41.38 ± 13.49; p = 0.979 (bilateral Student t-test) (Figure 2). Here, PECAM1 is linked to fetal growth restriction.