Effects of extremely low frequency magnetic field on fertility of adult male and female rats

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Abstract
To investigate the effects of an extremely low‐frequency (ELF) magnetic field on their fertility, adult male and female Sprague‐Dawley rats were exposed to a 50 Hz sinusoidal magnetic field of approximately 25 μT (rms) for 90 days before they were mated with unexposed counterparts. Exposure to a 50 Hz field reduced male rat fertility. The number of pregnant females was reduced when mated with exposed males, and the number of resorptions increased. The effects of magnetic field on male fertility were shown to be partly reversible, when the same exposed group of males were remated 45 and 90 days after being removed from the fields. Exposure of adult female rats to 50 Hz magnetic fields for 90 days before mating significantly reduced their fertility. The mean numbers of implantations and living fetuses per litter were statistically significantly decreased in the 50 Hz group. These results suggest that low frequency magnetic fields have some adverse effects on fertility of male and female rats. Bioelectromagnetics 22:340–344, 2001.