The connection between the character of fluorescence (F) of eggs and the quality of hens which laid these eggs was studied. For the eggs of hens of Russian White breed, the presence of 8 groups was established, which were arranged in diminishing order of spectrum from red to orange to yellow. It was established that there was a distinct dependence between the index of F and egg production of hens. The index of F and live weight were related to an inverse ratio. A distinct direct correlation was established between the index of F and the content of Hb, the number of erythrocytes in blood, and the development of digestive, respiratory, and excretory systems. Thus, the level of F depended on indexes of productivity because it reflected the character of physiological processes in the hen's organism. Fluorescent analysis can be used as a special means of selection for productivity, without the need of its direct evaluation. The advantages of such a method of selection are its simplicity and cheapness. Before the beginning of the practical application of selection according to the character of F, one should, however, clarify which changes in the type of poult will occur, upon a prolonged uniform selection according to this feature.