Exposure of mice to pulsed magnetic fields: long-term observations

This work was undertaken to check the effects of 460 Hz pulsed magnetic fields (PMF) on the growth curves of mice, and to observe any possible long term effect. Effects on the growth curves have already been shown in young female AKR mice. Eight-week-old Swiss female mice underwent, until death, a twice weekly a one-hour-exposure to a 460 Hz 6 mT PMF. They initially showed slower than that of the controls, but it later became faster, 460 Hz 9 mT PMF always kept the growth curves of the exposed mice under those of the controls. However, no difference with controls was noticed when the mice were exposed after the thirtieth week. Moreover, there was no difference in the survival or in pathological aspects between the exposed mice and controls.