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Lameth J, Royer J, Martin A, Marie C, Arnaud-Cormos D, Lévêque P, Poirier R, Edeline JM, Mallat M

Bioeffects Seen

Authors not listed · 2025

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Prenatal WiFi radiation exposure caused lasting thyroid damage in rat offspring that persisted one year after birth.

Plain English Summary

Summary written for general audiences

Researchers exposed pregnant rats to WiFi-frequency radiation (2.45 GHz) throughout pregnancy, then examined their offspring's thyroid glands one year later. The study found significant thyroid damage including increased tissue scarring, abnormal cells, DNA breaks, and cell death in animals whose mothers were exposed during pregnancy. This suggests that prenatal EMF exposure can cause lasting thyroid problems that persist into adulthood.

Why This Matters

This study reveals a troubling reality about prenatal EMF exposure that extends far beyond immediate developmental concerns. The fact that thyroid damage persisted a full year after birth suggests these effects may be permanent, not temporary disruptions that resolve over time. What makes this particularly relevant is the exposure level used: 12 mW/kg whole-body SAR is well within current safety limits and comparable to what pregnant women experience from WiFi routers, smartphones, and other 2.45 GHz devices in daily life.

The thyroid findings are especially concerning because this gland regulates metabolism, growth, and brain development throughout life. The researchers documented multiple types of cellular damage including DNA double-strand breaks, increased cell death, and tissue scarring. These aren't subtle changes but clear pathological alterations that could impact thyroid function for a lifetime. The science demonstrates that our current approach to EMF safety during pregnancy may be inadequate, particularly given that exposure was continuous throughout gestation, mimicking real-world conditions where expectant mothers are surrounded by wireless devices 24/7.

Exposure Information

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

Specific exposure levels were not quantified in this study.

Cite This Study
Unknown (2025). Lameth J, Royer J, Martin A, Marie C, Arnaud-Cormos D, Lévêque P, Poirier R, Edeline JM, Mallat M.
Show BibTeX
@article{lameth_j_royer_j_martin_a_marie_c_arnaud_cormos_d_lvque_p_poirier_r_edeline_jm_mallat_m_ce3927,
  author = {Unknown},
  title = {Lameth J, Royer J, Martin A, Marie C, Arnaud-Cormos D, Lévêque P, Poirier R, Edeline JM, Mallat M},
  year = {2025},
  doi = {10.1080/15368378.2025.2577318},
  
}
DOI: 10.1080/15368378.2025.2577318PubMed: 41125539

Quick Questions About This Study

Yes, this study found significant thyroid damage persisting one year after birth in rats whose mothers were exposed to 2.45 GHz radiation during pregnancy, suggesting these effects may be permanent rather than temporary developmental disruptions.
Prenatal 2.45 GHz exposure caused increased tissue scarring, abnormal thyroid cells, degenerated follicles, reduced colloid, increased cell death, and DNA double-strand breaks that were still present one year after birth.
Yes, the 12 mW/kg whole-body SAR used in this study is well within current safety limits and comparable to exposure levels from WiFi routers, smartphones, and other 2.45 GHz devices in typical daily use.
No, this study found thyroid damage persisted one year after birth even though offspring were not exposed to radiation after birth, suggesting prenatal EMF effects may cause lasting thyroid problems throughout life.
Yes, mothers exposed to 2.45 GHz radiation 24 hours daily throughout pregnancy produced offspring with significant thyroid cellular damage, DNA breaks, and tissue scarring that persisted into adulthood, indicating developmental programming effects.