ABSTRACT
Following irradiation with 2.45GHz microwave, pituitary hormonal changes in rabbits were observed. A 30 rabbits (New Zealand, White, Male) were used for the experiments, 10 for each experiment immediately following one two and four weeks after irradiation with amount of 2.4 Joule/cm2, 4.8 Joule/cm2 and 7.2 Joule/cm2 respectively. The following are the results of the study as a conclusion. The secretion of cortisol hormone increased immediately after the exposure and then decrease to below that of the control group until two weeks afterwards, followed by recovery phase with secretion level approaching that of the central group in 4 weeks. Lutenizing hormone showed a tendency of increase from the first week of exposure, rather than immediately after, lasting up to over four weeks, In the irradiation group for 30 min, however, the increase began immediately after the exposure. The secretion of of growth hormone showed an insignificant, increase after the second and fourth weeks over the control group. The duration of exposure did not have much effect on the hormonal secretion. Thyroid stimulating hormone showed a different pattern changes: increase of immediately after exposure, decreased in two weeks, and then approaching the level of the control group after four weeks.