Avian and poultry biology reviews vol:15 issue:3-4 pages:150-159
In this review, different techniques are presented that measure non-destructively physiological aspects of incubation eggs during the incubation. Mainly, they can be categorised in four groups. Firstly, there are techniques that detect fertility of egg early in the incubation. These techniques are detecting the presence of a living embryo indirectly, i.e. by detecting events that are going on outside the embryo. Three different techniques were found in literature: an imaging technique, the calculation of blood values and an Acoustic Resonance Technique. There is discussion about the mechanisms that form the basis of these detection methods.