VEGFA and retinopathy of prematurity: The concentration of VEGF-A in relation to ROP was examined using a postnatal timescale in 22 publications40,55,56,58, 59, 60, 61, 62, 63, 64,66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77 to compare VEGF-A levels between the ROP and control groups (Table 3).