Authors

Salama N, Kishimoto T, Kanayama HO, Kagawa S. Effects of exposure to a mobile phone on sexual behavior in adult male rabbit: an observational study. Int J Impot Res. Nov 26, 2009. Ahead of print.

Introduction
Various non-thermal effects of exposure to electromagnetic radiation emitted by mobile phones (MPs) on the central nervous system have been studied. Recent studies have shown negative effect of mobile phones on the male genital system. Male sexual behaviour is the result of collaboration between the brain and the genital system. There have been no studies of potential effects of exposure to electromagnetic radiation from mobile phones on male sexual behaviour.

Objective
The study was aimed at examining these effects using the adult male rabbit as a model.

Methods
A total of 18 male White New Zealand rabbits 20 weeks of age were randomly divided into 3 groups: the mobile phone group and 2 control groups. Six females were successively placed in the male’s cage for 3 minutes each and the male’s sexual performance was recorded. Animals in the mobile phones group were exposed to 800 MHz radiation from conventional GSM handsets in a standby position for 8 hours daily for 12 weeks. Animals of the first control group (the stress controls) were placed for 8 hours daily in cages identical to those in which the mobile phone group was exposed, but the mobile phone was switched off. Animals in the second control group (the ordinary controls) were left in the standard cages throughout the study. After the 12-week exposure the rabbits’ sexual performance was examined again twice a week for 2 weeks. Blood samples were collected at the start and at the end of the study for testosterone, cortisol and dopamine assays.

Results
There were no significant group differences in serum testosterone, cortisol and dopamine levels either at the start or at the end of the study. The mean rectal temperature did not change after the exposure. No group differences in sexual performance were observed before the exposure. After the exposure, the mobile phones group showed lower frequency and duration of mounts with ejaculation and lower frequency of ejaculation compared to the 2 control groups. The frequency and duration of mounts without ejaculation and biting/grasping were significantly higher in the mobile phones group than in the control groups. There were no significant group differences in the mount latency and ejaculation latency.

Interpretation and Conclusion
Exposure to the pulsed radiofrequency radiation emitted by conventional mobile phones in a standby position could affect sexual behaviour in the rabbit.


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