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Reproductive Health

Effects on rat testis of 1.95-GHz W-CDMA for IMT-2000 cellular phones.

No Effects Found

Imai N, Kawabe M, Hikage T, Nojima T, Takahashi S, Shirai T. · 2011

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This rat study found no testicular harm from cell phone radiation at 0.4 W/kg SAR, contradicting some fertility research.

Plain English Summary

Summary written for general audiences

Japanese researchers exposed male rats to cell phone radiation (1.95 GHz W-CDMA signal) for 5 hours daily over 5 weeks during their reproductive development. They found no harmful effects on sperm production, quality, or testicular health at either exposure level tested (0.4 and 0.08 W/kg SAR). In fact, sperm count actually increased slightly in the higher exposure group, though this may not be biologically meaningful.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 1.95 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 1.95 GHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

The study examined exposure from: 1.95-GHz Duration: 5 hours per day, 7 days a week for 5 weeks

Study Details

The present study was performed to investigate the effects of a 1.95 GHz electromagnetic field on testicular function in male Sprague-Dawley rats.

Five week old animals were divided into 3 groups of 24 each and a 1.95-GHz wide-band code division m...

There were no differences in body weight gain or weights of the testis, epididymis, seminal vesicles...

Thus, under the present exposure conditions, no testicular toxicity was evident.

Cite This Study
Imai N, Kawabe M, Hikage T, Nojima T, Takahashi S, Shirai T. (2011). Effects on rat testis of 1.95-GHz W-CDMA for IMT-2000 cellular phones. Syst Biol Reprod Med. 57(4):204-209,2011.
Show BibTeX
@article{n_2011_effects_on_rat_testis_3098,
  author = {Imai N and Kawabe M and Hikage T and Nojima T and Takahashi S and Shirai T.},
  title = {Effects on rat testis of 1.95-GHz W-CDMA for IMT-2000 cellular phones.},
  year = {2011},
  doi = {10.3109/19396368.2010.544839},
  url = {https://www.tandfonline.com/doi/full/10.3109/19396368.2010.544839},
}
DOI: 10.3109/19396368.2010.544839

Cited By (61 papers)

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Quick Questions About This Study

A 2011 Japanese study found no harmful effects on male reproductive health from 1.95 GHz W-CDMA radiation. Researchers exposed male rats for 5 hours daily over 5 weeks and observed no damage to sperm production, quality, or testicular health at exposure levels of 0.4 and 0.08 W/kg SAR.
Japanese researchers found that 5 hours of daily 1.95 GHz cell phone radiation exposure over 5 weeks did not decrease sperm count in male rats. Surprisingly, sperm count actually increased slightly in the higher exposure group (0.4 W/kg SAR), though this increase may not be biologically meaningful.
A 2011 study found no testicular tissue damage from W-CDMA signal radiation during reproductive development. Male rats exposed to 1.95 GHz radiation showed normal testicular weight, sperm tube structure, and reproductive organ development compared to unexposed control groups throughout the 5-week study period.
Research shows that 0.4 W/kg SAR cell phone radiation does not impair sperm motility. Japanese scientists exposed male rats to 1.95 GHz W-CDMA radiation and found no abnormalities in sperm movement patterns or sperm shape compared to control groups after 5 weeks of daily exposure.
A comprehensive 2011 study found no reproductive risks from IMT-2000 cellular phone frequencies (1.95 GHz W-CDMA). Male rats exposed during reproductive development showed normal testicular function, healthy sperm production, and proper reproductive organ weights, indicating no testicular toxicity under these exposure conditions.