To study whether protracted prenatal exposure of rats to 2450 MHz microwave irradiation at a power density level of 20 mW/cm², which did not cause an overt increase in maternal body temperature, would significantly alter postnatal growth and psychophysiologic development.
Of 75 pregnant rats, 12 animals were exposed to microwave irradiation, four rats were sham exposed, and 59 served as control animals. The neonates were examined and weighed on day three and weekly thereafter until 87 days of age. Neonatal reflex tests were initiated as early as day three. One physiologic parameter, eye opening, was also observed. Mothers were rebred ten days after weaning and a morphological evaluation was completed on the second litter. Behavioral tests were begun at 60 d of age. At 90 days of age offspring were bred within and across groups, and a morphological teratologic analyses was completed on the offspring. Tissue samples were collected and organ weights were recorded of all animals.
|power density||20 mW/cm²||-||-||-||-|
The findings indicated that there were no significant malformations or significant alterations in the neonatal physiologic or reflex test results, body/organ weight ratios, or breeding results in the adult offspring. There were no significant changes in five of the six adult behavioral tests, but exposed offspring was significantly more active than control offspring.
These findings are indicative of possible irradiation-induced behavioral changes. Further investigations are needed to explore the possibility of microwave exposure-related changes in animal behavior.