Note: This study found no significant biological effects under its experimental conditions. We include all studies for scientific completeness.
Lee HJ et al, (October 2011) The effects of simultaneous combined exposure to CDMA and WCDMA electromagnetic fields on rat testicular function, Bioelectromagnetics
No Effects Found
Authors not listed · 2011
Combined CDMA and WCDMA radiation at very high levels showed no testicular damage in rats during 12-week study.
Plain English Summary
Summary written for general audiences
Researchers exposed male rats to combined CDMA and WCDMA cell phone radiation at 4.0 W/kg SAR for 45 minutes daily over 12 weeks, then examined sperm production and reproductive health markers. The study found no adverse effects on sperm count, testosterone levels, or testicular function. This suggests that simultaneous exposure to multiple cell phone frequencies may not harm male fertility at these levels.
Cite This Study
Unknown (2011). Lee HJ et al, (October 2011) The effects of simultaneous combined exposure to CDMA and WCDMA electromagnetic fields on rat testicular function, Bioelectromagnetics.
Show BibTeX
@article{lee_hj_et_al_october_2011_the_effects_of_simultaneous_combined_exposure_to_cdma_and_wcdma_electromagnetic_fields_on_rat_testicular_function_bioelectromagnetics_ce711,
author = {Unknown},
title = {Lee HJ et al, (October 2011) The effects of simultaneous combined exposure to CDMA and WCDMA electromagnetic fields on rat testicular function, Bioelectromagnetics},
year = {2011},
doi = {10.1002/bem.20715},
}Quick Questions About This Study
This study found no effects on sperm count, testosterone levels, or testicular function in rats exposed to combined CDMA and WCDMA radiation at 4.0 W/kg SAR for 12 weeks. However, this represents limited exposure duration compared to typical human usage patterns.
The rats were exposed to 4.0 W/kg total SAR (2.0 W/kg each for CDMA and WCDMA). This is extremely high compared to typical cell phone exposure limits of 0.2 W/kg in most countries, making it a rigorous safety test.
The exposure protocol was 45 minutes per day, 5 days per week, for 12 weeks total. This represents significantly less daily exposure time than many humans experience with wireless devices in modern usage patterns.
This study specifically tested combined CDMA and WCDMA exposure to simulate real-world conditions with multiple signals. No additional harm was observed from simultaneous exposure compared to what might be expected from single frequencies.
Scientists examined sperm count, testosterone levels, oxidative stress markers, spermatogenesis stages, cell death indicators, and stress proteins including p53, bcl2, GADD45, cyclin G, and HSP70. All parameters remained normal after the 12-week exposure period.