An 1800 MHz Electromagnetic Field Affects Hormone Levels, Sperm Quality, and Behavior in Laboratory Rats

Abstract

Category: Toxicology, Endocrinology, Reproductive Biology Institution: Not specified Tags: electromagnetic fields, 1800 MHz, hormone levels, sperm quality, rat behavior, reproductive health, EMF exposure DOI: 10.3390/app15095160 URL: mdpi.com Overview Mobile communication systems generate artificial electromagnetic fields (EMFs), adding to natural EMFs present in our environment. With increasing exposure, concerns arise about their biological impacts. This study specifically investigates the effects of a 1800 MHz EMF on hormone concentrations, sperm motility, viability, morphology, and behavior in laboratory rats (Rattus norvegicus). Study Design - 28 rats were split into two equal groups (control and experimental). - The experimental group was exposed to the EMF for 12 weeks (10 minutes, four times daily). - The control group was maintained under standard conditions. - After 12 weeks, half from each group were euthanized for data collection; the remaining rats continued for another 4 weeks without EMF exposure. Findings - Rats exposed to 1800 MHz EMF showed elevated corticosterone levels and decreased thyroid-stimulating hormone, with these changes persisting for 2 weeks after exposure ended. - Sperm quality in the experimental group notably declined, with observed decreases in motility and viability. - Behavioral assessments indicated increased anxiety in exposed rats. - Exposure-level details: electric field intensity ranged 2.8–5.7 V/m, magnetic field intensity 7.2–14.0 mA/m, and power density 17.7–63.6 mW/m2 at a 1800 MHz frequency. These were measured at a 30-40 cm distance from animals. Conclusion Exposure to 1800 MHz EMFs has clear biological effects, including disruption of hormone levels, compromised sperm quality, and behavioral changes. While some hormonal changes appear reversible, these findings strongly indicate that electromagnetic fields can adversely impact reproductive and endocrine health as well as animal behavior, underscoring the importance of further research into EMF health risks.

AI evidence extraction

Main findings

Compared with controls, rats exposed to a 1800 MHz EMF for 12 weeks had elevated corticosterone and decreased thyroid-stimulating hormone, with hormonal changes reported to persist for 2 weeks after exposure ended. Exposed rats showed reduced sperm quality (decreased motility and viability) and behavioral assessments indicated increased anxiety.

Outcomes measured

• corticosterone levels
• thyroid-stimulating hormone (TSH)
• sperm motility
• sperm viability
• sperm morphology
• behavior/anxiety

Limitations

• No SAR reported
• Exposure described via field intensity/power density at 30–40 cm; dosimetry details beyond this not provided in the abstract
• Institution not specified

Suggested hubs

• who-icnirp (0.2)
  Animal study on RF exposure relevant to broader EMF health-risk evidence base used in guideline discussions.

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    "exposure": {
        "band": "RF",
        "source": "mobile communication systems",
        "frequency_mhz": 1800,
        "sar_wkg": null,
        "duration": "12 weeks; 10 minutes four times daily (with follow-up 4 weeks without exposure)"
    },
    "population": "Laboratory rats (Rattus norvegicus)",
    "sample_size": 28,
    "outcomes": [
        "corticosterone levels",
        "thyroid-stimulating hormone (TSH)",
        "sperm motility",
        "sperm viability",
        "sperm morphology",
        "behavior/anxiety"
    ],
    "main_findings": "Compared with controls, rats exposed to a 1800 MHz EMF for 12 weeks had elevated corticosterone and decreased thyroid-stimulating hormone, with hormonal changes reported to persist for 2 weeks after exposure ended. Exposed rats showed reduced sperm quality (decreased motility and viability) and behavioral assessments indicated increased anxiety.",
    "effect_direction": "harm",
    "limitations": [
        "No SAR reported",
        "Exposure described via field intensity/power density at 30–40 cm; dosimetry details beyond this not provided in the abstract",
        "Institution not specified"
    ],
    "evidence_strength": "low",
    "confidence": 0.7800000000000000266453525910037569701671600341796875,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "electromagnetic fields",
        "1800 MHz",
        "RF",
        "hormone levels",
        "corticosterone",
        "thyroid-stimulating hormone",
        "sperm quality",
        "motility",
        "viability",
        "rat behavior",
        "anxiety",
        "reproductive health"
    ],
    "suggested_hubs": [
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            "reason": "Animal study on RF exposure relevant to broader EMF health-risk evidence base used in guideline discussions."
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