Effects of repeated 9 and 30-day exposure to extremely low-frequency electromagnetic fields on social recognition behavior and estrogen receptor expression in olfactory bulb of Wistar female rats

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Summary:

This animal study investigated the effects of ELF MF on social behaviour. A total of 120 rats were equally divided into an exposed group (either 9 or 30 days of ELF MF exposure) and unexposed group. In each group, the rats were equally divided into 3 sub-groups where they were exposed to different levels of estrogen. The exposure was at a frequency of 60 Hertz (Hz) and magnetic flux density of 1 millitesla (five times the public exposure limit in the international guidelines developed by the International Commission on Non-Ionizing Radiation Protection, ICNIRP). The rats were tested for their learning ability to recognise other rats that they have encountered, and their brains were also extracted and analysed. The authors found that the effect of ELF MF exposure on social behaviour may be estrogen-dependent.

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