The experiment was held on the determination of the influence of continuous electromagnetic field onthe hens eggs incubation index and showeda positive effect, increasing the incubationlevel. The evidence of hatching indices during the incubation period showed, that the dynamics of eggs weight in the control and experimental groups was practicly the same with the difference of 0.5 % between them. The diameter of eggs air cell is the index which characterizes the embryonic evolution, and due to the fact that it was smaller in the experimental group, it explains that the embryos’ development had a better intensity. The results of electromagnetic irradiation depend on many factors as: the earth electromagnetic intensity, the day and the time of irradiation. In our experiment the electromagnetic field had a positive influence, increasing up the incubation indices. The level of eggs’ incubation was higher in the experimental group with 9.0%. The use of electromagnetic irradiation produced by the apparatus UEM-5, allowed us to improve the incubation level, and it had a positive influence on embryos immunity system, and also we noticed that the incubation process started earlier with 7 hours in the experimental group, what has a great importance for the technological process.