Background: Chrysomya albiceps has a great medical and sanitary importance, causing infestation of human by the larvae (myiasis). Also, C. albiceps mechanically can transmit bacteria, viruses and helminths to human and animals. Materials and Methods: larvae of C. albiceps were collected using fish as media. The irradiation process carried out using Gamma cell-40 (cesium-137 irradiation unit) at the rate of 2.3 Gy/min (doses: 4 and 10 Gy). Eggs laid by females resulted from irradiated pupae were taken and subjected to embryogenesis examination at different intervals of time (every hour from 1 to 13 hours). Results:First cleavage nuclei were observed after 1 hour from oviposition, after about 2 and 3 hours, the cleavage nuclei became surrounded by a halo of cytoplasm and migrated toward the periphery of the egg. After 4 hours, the cleavage cells were reached the periphery of egg leaving few nuclei in the center which form the vitellophages, almost all cleavage cells were merged within the periplasm to form continuous cellular layer or the "blastoderm" after five hours from oviposition. The gastrulation was appeared as furrows in the germ bandwithin 8 hours from oviposition. Complete gastrulation was attained within 8-10 hours. At 4 Gy of gamma radiation, blastoderm was formed within 7 hours and gastrulation was attained within 12 hours from oviposition. Organogenesis continued normally, foregut and hindgut were formed within 13 hours. Conclusion: lower dose ofgamma radiation (4 Gy) induced a prolongation in the embryogenesis as compared with control,while 10 Gy of gamma radiation inhibited the embryogenesis by blocking the gastrulation.