EPO and anemia (phenotype): This study aimed to identify stably expressed reference genes among eight commonly used reference genes in the neonatal rat pups’ retina upon exposure to cyclic hyperoxia-hypoxia, anemia, and erythropoietin administration at two age groups (P14.5 and P20) using Bestkeeper, geNorm, and Normfinder, three publicly available, free algorithms, and comparing their results to the in-silico prediction program, RefFinder.