ELN and fetal growth restriction: Collagen fiber density was significantly reduced in IUGR (n = 10) compared to CTRL (n = 10) females (mean ± SEM, μm2: 14,813 ± 880 vs. 17,670 ± 1399; p = 0.0002), whereas elastin fiber density was significantly increased in IUGR (n = 10) compared to CTRL (n = 10) females (mean ± SEM, μm2: 17,493 ± 1976 vs. 11,905 ± 2214; p = 0.001) (Figure 1C,D).