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Reproductive Health

Effect of in utero wi-fi exposure on the pre- and postnatal development of rats.

No Effects Found

Poulletier de Gannes F, Haro E, Hurtier A, Taxile M, Athane A, Ait-Aissa S, Masuda H, Percherncier Y, Ruffié G, Billaudel B, Dufour P, Veyret B, Lagroye I. · 2012

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Wi-Fi exposure during rat pregnancy showed no birth defects at levels far exceeding typical home exposure.

Plain English Summary

Summary written for general audiences

French researchers exposed pregnant rats to Wi-Fi signals (2.45 GHz) for 2 hours daily during pregnancy to test whether this radiation could harm developing babies. They found no birth defects, developmental problems, or other harmful effects in the rat pups, even at the highest exposure level tested (4 W/kg). This study suggests that Wi-Fi exposure during pregnancy may not cause developmental harm at levels tested.

Why This Matters

This study provides reassuring evidence about Wi-Fi exposure during pregnancy, but the context matters significantly. The highest exposure level tested (4 W/kg) far exceeds typical Wi-Fi exposure levels, which usually measure in milliwatts per kilogram. While finding no developmental effects is positive, this represents just one study examining a limited set of outcomes over a relatively short timeframe. The reality is that pregnancy represents a uniquely vulnerable developmental window, and the absence of obvious birth defects doesn't rule out subtler effects on brain development, behavior, or long-term health that might not manifest until later in life. What this means for you is that while this particular study is reassuring, the broader scientific picture on developmental EMF effects remains mixed, with some studies showing concerning neurological and behavioral effects from prenatal exposure.

Exposure Details

SAR
0.08, 0.4, and 4 W/kg
Source/Device
2450 MHz
Exposure Duration
2 hr/day, 6 days/week for 18 days

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 0.08, 0.4, and 4 W/kgExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kgEffects observed in the Severe Concern range (Building Biology)FCC limit is 20 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 increase in exposure to the Wireless Fidelity (Wi-Fi) wireless communication signal has raised public health concerns especially for young people. Animal studies looking at the effects of early life and prenatal exposure to this source of electromagnetic fields, in the radiofrequency (RF) range, on development and behavior have been considered as high priority research needs by the World Health Organization.

For the first time, our study assessed the effects of in utero exposure to a 2450 MHz Wi-Fi signal (...

For all test conditions, no abnormalities were noted in the pregnant rats and no significant signs o...

In the present study, no teratogenic effect of repeated exposures to the Wi-Fi wireless communication signal was demonstrated even at the highest level of 4 W/kg. The results from this screening study aimed at investigating Wi-Fi effects, strengthen the previous conclusions that teratology and development studies have not detected any noxious effects of exposures to mobile telephony-related RF fields at exposure levels below standard limits.

Cite This Study
Poulletier de Gannes F, Haro E, Hurtier A, Taxile M, Athane A, Ait-Aissa S, Masuda H, Percherncier Y, Ruffié G, Billaudel B, Dufour P, Veyret B, Lagroye I. (2012). Effect of in utero wi-fi exposure on the pre- and postnatal development of rats. Birth Defects Res B Dev Reprod Toxicol. 95(2):130-136, 2012.
Show BibTeX
@article{f_2012_effect_of_in_utero_3309,
  author = {Poulletier de Gannes F and Haro E and Hurtier A and Taxile M and Athane A and Ait-Aissa S and Masuda H and Percherncier Y and Ruffié G and Billaudel B and Dufour P and Veyret B and Lagroye I.},
  title = {Effect of in utero wi-fi exposure on the pre- and postnatal development of rats.},
  year = {2012},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/22311618/},
}
PubMed: 22311618

Cited By (50 papers)

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Quick Questions About This Study

French researchers exposed pregnant rats to WiFi signals (2.45 GHz) for 2 hours daily and found no birth defects or developmental problems in the babies. Even at high exposure levels of 4 W/kg, the study detected no harmful effects on pregnancy outcomes or pup development.
A 2012 study found that 2 hours of daily WiFi exposure (2.45 GHz) during pregnancy caused no birth defects in rat offspring. Researchers tested exposure levels up to 4 W/kg and observed no abnormalities in pregnant rats or developmental problems in their pups.
Research shows that WiFi radiation at 4 W/kg does not harm developing rat embryos. French scientists exposed pregnant rats to this high level of 2.45 GHz radiation daily and found no teratogenic effects or developmental toxicity in the offspring.
When pregnant rats were exposed to 2450 MHz WiFi radiation for 2 hours daily, researchers found no negative effects on pregnancy or offspring development. The study tested various exposure levels and detected no abnormalities in mothers or babies, even at maximum intensity.
Prenatal exposure to WiFi frequencies (2.45 GHz) does not affect postnatal development in rats according to French research. Scientists found no significant developmental problems in rat pups whose mothers received daily 2-hour WiFi exposures during pregnancy, even at high power levels.