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INFLUENCE OF LOW-LEVEL ELECTRIC AND MAGNETIC FIELDS ON THE GROWTH OF YOUNG CHICKENS

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W. F. Krueger, A. J. Giarola, J. W. Bradley, S. R. Darvall · 1972

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1972 study found baby chicks exposed to 880 MHz signals showed significantly reduced growth rates compared to unexposed controls.

Plain English Summary

Summary written for general audiences

This 1972 study exposed baby chicks to various electromagnetic fields including UHF (880 MHz), VHF (260 MHz), and low-frequency electric and magnetic fields for 28 days. Chicks exposed to 880 MHz UHF signals showed significantly reduced growth rates, while those exposed to low-frequency electric fields also experienced growth depression. The findings suggest that even relatively low-power electromagnetic exposures can impact biological development in young animals.

Why This Matters

This early research from 1972 provides compelling evidence that electromagnetic field exposure can disrupt normal biological processes during critical developmental periods. What makes this study particularly relevant is that the 880 MHz frequency tested is remarkably close to modern cellular frequencies, and the power density of 35 µW/cm² falls within ranges we encounter from cell towers and wireless devices today. The fact that continuous exposure caused measurable growth depression in developing chicks raises important questions about chronic EMF exposure effects on children, whose developing systems may be similarly vulnerable. While this research predates our current wireless world by decades, it demonstrates that biological systems can be sensitive to EMF levels previously assumed to be safe. The consistency of growth effects across different frequency ranges suggests this isn't an isolated phenomenon but rather points to a fundamental biological response to electromagnetic field exposure.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
W. F. Krueger, A. J. Giarola, J. W. Bradley, S. R. Darvall (1972). INFLUENCE OF LOW-LEVEL ELECTRIC AND MAGNETIC FIELDS ON THE GROWTH OF YOUNG CHICKENS.
Show BibTeX
@article{influence_of_low_level_electric_and_magnetic_fields_on_the_growth_of_young_chick_g6097,
  author = {W. F. Krueger and A. J. Giarola and J. W. Bradley and S. R. Darvall},
  title = {INFLUENCE OF LOW-LEVEL ELECTRIC AND MAGNETIC FIELDS ON THE GROWTH OF YOUNG CHICKENS},
  year = {1972},
  
  
}

Quick Questions About This Study

Yes, chicks continuously exposed to 880 MHz UHF signals showed significantly depressed growth rates compared to control groups. The effect was consistent throughout the 28-day study period, with exposed chicks remaining smaller than unexposed birds.
Researchers used a calculated average power density of 35 µW/cm² for the electromagnetic field exposures. This level is within the range of exposures people experience from cell towers and wireless devices in everyday environments.
The chicks were continuously exposed to electromagnetic fields for 28 days, from hatching through early development. This chronic exposure approach allowed researchers to assess cumulative effects during a critical growth period.
Yes, chicks exposed to low-frequency electric fields (60 Hz and 45 Hz) showed significantly reduced growth rates. The 60 Hz exposure at 3,100 V/m was particularly effective at depressing normal development patterns.
No observable differences in bird behavior were noted as a result of electromagnetic field exposure. The effects were limited to measurable changes in growth rate, feed utilization, and overall physical development parameters.