Chicken eggs will not maintain peak hatchability for long when the eggs are stored. The chapter describes how both egg quality and embryo development will influence the effect of egg storage, considers practical aspects of using storage temperature, humidity and egg turning to keep eggs in good condition, with some reference to particular aspects of egg hygiene and egg transport. A case study describes the work at Aviagen developing a robust method to deliver short periods of incubation during egg storage to improve the hatchability of stored eggs.