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A confirmation study of Russian and Ukrainian data on effects of 2450 MHz microwave exposure on immunological processes and teratology in rats.

No Effects Found

de Gannes FP, Taxile M, Duleu S, Hurtier A, Haro E, Geffard M, Ruffié G, Billaudel B, Lévêque P, Dufour P, Lagroye I, Veyret B. · 2009

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This study found no immune or reproductive effects from month-long microwave exposure at levels below typical cell phone use.

Plain English Summary

Summary written for general audiences

French researchers exposed pregnant rats to 2450 MHz microwave radiation (the same frequency used in microwave ovens and WiFi) for 7 hours daily over 30 days to test whether this exposure affects immune function or causes birth defects. They found no effects on immune system markers or fetal development at the power levels tested. This study was designed to confirm earlier Russian and Ukrainian research that had suggested potential harmful effects.

Why This Matters

This confirmation study highlights a critical issue in EMF research: the challenge of replicating findings across different laboratories and methodologies. While the French researchers found no effects at 0.16 W/kg SAR exposure levels, this doesn't close the book on microwave radiation safety. The exposure level used was relatively low compared to what your head experiences during a cell phone call (which can reach 1-2 W/kg), but it was sustained over much longer periods than typical daily phone use. What this means for you is that the science remains mixed on immune and reproductive effects from microwave radiation. The reality is that negative studies like this one are important for the scientific record, but they represent just one data point in a complex field where positive findings from other laboratories suggest caution is still warranted, especially given the ubiquitous nature of these exposures in our daily lives.

Exposure Details

SAR
0.16 W/kg
Source/Device
2450 MHz
Exposure Duration
7h/day, 30 days

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 0.16 W/kgExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kgEffects observed in the Extreme Concern range (Building Biology)FCC limit is 10 times higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 2.45 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 2.45 GHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

The aim of this study is to investigate A confirmation study of Russian and Ukrainian data on effects of 2450 MHz microwave exposure on immunological processes and teratology in rats.

In our study, a new system was constructed to expose free-moving rats under far-field conditions. Wh...

All results, using ELISA and classic teratology end points, were negative in our laboratory.

we conclude that, under these exposure conditions (2450 MHz, CW, 7h/day, 30 days, 0.16 W/kg whole-body SAR), RF-radiation exposure had no influence on several immune and degenerative parameters or on prenatal development.

Cite This Study
de Gannes FP, Taxile M, Duleu S, Hurtier A, Haro E, Geffard M, Ruffié G, Billaudel B, Lévêque P, Dufour P, Lagroye I, Veyret B. (2009). A confirmation study of Russian and Ukrainian data on effects of 2450 MHz microwave exposure on immunological processes and teratology in rats. Radiat Res. 172(5):617-624, 2009.
Show BibTeX
@article{fp_2009_a_confirmation_study_of_2997,
  author = {de Gannes FP and Taxile M and Duleu S and Hurtier A and Haro E and Geffard M and Ruffié G and Billaudel B and Lévêque P and Dufour P and Lagroye I and Veyret B.},
  title = {A confirmation study of Russian and Ukrainian data on effects of 2450 MHz microwave exposure on immunological processes and teratology in rats.},
  year = {2009},
  
  url = {https://hal.archives-ouvertes.fr/hal-00429262},
}

Quick Questions About This Study

A 2009 French study exposed pregnant rats to 2450 MHz radiation (WiFi frequency) for 7 hours daily over 30 days and found no birth defects or fetal development problems. The research specifically tested whether microwave oven and WiFi frequencies cause teratogenic effects during pregnancy.
French researchers found that 7 hours of daily 2450 MHz exposure during pregnancy had no impact on immune system markers in rats. The study used ELISA testing to measure immune parameters and found all results were negative under these specific exposure conditions.
This 2009 French confirmation study contradicted earlier Russian and Ukrainian research suggesting harmful effects from 2450 MHz radiation. The French researchers found no immune or developmental effects, highlighting potential differences in methodology or interpretation between research groups from different countries.
A controlled study using 0.16 W/kg whole-body SAR exposure found no effects on immune function or fetal development in pregnant rats. This specific absorption rate represents relatively low-level exposure compared to many consumer devices, suggesting safety at these power levels.
The 2009 study used continuous wave 2450 MHz radiation and found no prenatal development effects. While this research didn't compare continuous versus pulsed signals, the continuous wave exposure at WiFi frequencies showed no teratogenic effects in the controlled laboratory conditions tested.