NOS3 and retinopathy of prematurity: We also found that the: 1) VEGFA haplotype (ACTT) decreases the risk of RDS and increases the risk of BPD (Table 9); 2) the VEGFA haplotype (TCCT) decreases the risk of ROP and increases the risk of IVH (Tble 9); 3) the rare (CaT and TaT) and CbT eNOS haplotypes were significantly associated with different effects (risk for RDS and BPD and protection from IVH and ROP) on clinical prematurity complications (Table 9).