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Testicular function of rats following exposure to microwave radiation.

Bioelectromagnetics · 1983 · No effect · Low evidence

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No effectLow evidencePaper 5954

Rats exposed to pulse-modulated 1.3 GHz microwave radiation (mean dose rate 6.3 mW/g) for 6 h/day for nine days showed no statistically significant differences versus sham controls in organ masses, daily sperm production, sperm morphology, or epididymal sperm…

Study snapshot

PublicationBioelectromagnetics · 1983
Study typeanimal
Reported directionNo effect
Evidence ratingLow

Abstract

Male Sprague-Dawley rats were exposed for 6 h per day for nine days to pulse-modulated microwave radiation (1.3 GHz, at 1-microseconds pulse width, 600 pulses per second). Exposures were carried out in cylindrical waveguide sections at a mean dose rate of 6.3 mW/g; sham controls were treated similarly and received no irradiation. At time periods corresponding to 0.5, 1.0, 2.0, and 4.0 cycles of the seminiferous epithelium, groups of four sham-irradiated and four irradiated rats were killed and the testes removed for analysis. Net mass of the testes, epididymides, and seminal vesicles; daily sperm production (DSP) per testis and per gram of testis; sperm morphology; and the number of epididymal sperm were determined. There were no statistically significant differences between the sham-irradiated and irradiated groups with respect to any measured variable. In a group of seven surrogate animals of similar body mass, the dose rate of 6.3 mW/g caused a net change in body temperature (via rectal probe) of 1.5 degrees C.

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeanimal
Effect directionno_effect
PopulationMale Sprague-Dawley rats
Sample sizeNot supplied
Exposuremicrowave · 1300 MHz · 6.3 W/kg · 6 h/day for 9 days
Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

Rats exposed to pulse-modulated 1.3 GHz microwave radiation (mean dose rate 6.3 mW/g) for 6 h/day for nine days showed no statistically significant differences versus sham controls in organ masses, daily sperm production, sperm morphology, or epididymal sperm counts. In surrogate animals, this dose rate was associated with a net body temperature increase of 1.5°C.

Outcomes measured

  • Net mass of testes
  • Net mass of epididymides
  • Net mass of seminal vesicles
  • Daily sperm production (per testis and per gram of testis)
  • Sperm morphology
  • Number of epididymal sperm
  • Body temperature change (rectal) in surrogate animals

Limitations

  • Total sample size for exposed vs sham groups not fully reported (only groups of four per time point are described).
  • Temperature change was measured in a separate surrogate group rather than the main experimental animals.
View raw extracted JSON
{
  "study_type": "animal",
  "exposure": {
    "band": "microwave",
    "source": null,
    "frequency_mhz": 1300,
    "sar_wkg": 6.3,
    "duration": "6 h/day for 9 days"
  },
  "population": "Male Sprague-Dawley rats",
  "sample_size": null,
  "outcomes": [
    "Net mass of testes",
    "Net mass of epididymides",
    "Net mass of seminal vesicles",
    "Daily sperm production (per testis and per gram of testis)",
    "Sperm morphology",
    "Number of epididymal sperm",
    "Body temperature change (rectal) in surrogate animals"
  ],
  "main_findings": "Rats exposed to pulse-modulated 1.3 GHz microwave radiation (mean dose rate 6.3 mW/g) for 6 h/day for nine days showed no statistically significant differences versus sham controls in organ masses, daily sperm production, sperm morphology, or epididymal sperm counts. In surrogate animals, this dose rate was associated with a net body temperature increase of 1.5°C.",
  "effect_direction": "no_effect",
  "limitations": [
    "Total sample size for exposed vs sham groups not fully reported (only groups of four per time point are described).",
    "Temperature change was measured in a separate surrogate group rather than the main experimental animals."
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "rats",
    "Sprague-Dawley",
    "microwave radiation",
    "pulse-modulated",
    "1.3 GHz",
    "testicular function",
    "spermatogenesis",
    "daily sperm production",
    "sperm morphology",
    "epididymal sperm",
    "body temperature"
  ],
  "suggested_hubs": []
}
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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1002/bem.2250040202
PubMed: 6870965

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