A study was made of the combined effect of microwaves (40 microW /cm2, 5 min) and gamma-radiation on imprinting of chickens exposed 24 h after the beginning of incubation. It was established that microwaves and gamma-radiation delivered simultaneously during early embryogenesis exerted a distinctive influence on the central nervous system (the formation of imprinting was impaired) which was different from that produced by gamma-irradiation alone.
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