How does eggs breath inside incubator?

Eggs do not breathe in the traditional sense, but they do exchange gases through their porous shells. Inside an incubator, oxygen from the air enters the egg while carbon dioxide produced by the developing embryo exits. This gas exchange is crucial for the embryo's development, and maintaining proper humidity and temperature in the incubator helps facilitate this process. The porous nature of the eggshell allows this exchange to occur effectively while protecting the embryo.