From adults to offspring: Wi-Fi RF-EMR exposure in adult zebrafish impairs reproduction and transgenerationally effects development and behavior of progeny

Sci Total Environ · 2025 · Harm · Low evidence

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HarmLow evidencePaper 2494

Study snapshot

PublicationSci Total Environ · 2025

Study typeanimal

Reported directionHarm

Evidence ratingLow

Abstract

Category: Toxicology, Environmental Health Tags: RF-EMR, Wi-Fi, zebrafish, transgenerational effects, reproductive toxicity, developmental abnormalities, neurobehavioral changes DOI: 10.1016/j.scitotenv.2025.180982 URL: pubmed.ncbi.nlm.nih.gov Overview The widespread presence of wireless communication technologies in modern human society is raising concerns about the biological effects of radiofrequency electromagnetic radiation (RF-EMR). In this study, the impacts of Wi-Fi induced RF-EMR exposure in Danio rerio (zebrafish) were examined. Adult zebrafish were exposed to 4 hours of RF-EMR daily from a 4G Wi-Fi router over a 30-day period. The exposed adult fish were bred under exposure-free conditions, on the 10th, 20th, and 30th day of experimentation. Experimental Design - Adult zebrafish exposed to RF-EMR (from a 4G Wi-Fi router) for 4 hours per day, up to 30 days. - Breeding occurred on days 10, 20, and 30 of exposure. - Fertilized embryos were maintained under electromagnetic field (EMF)-free conditions and monitored up to 10 days post-fertilization (dpf). Findings - Histopathological analysis revealed significant testicular abnormalities, such as seminiferous tubule disintegration, reduced spermatids, and abnormal lumina. - Ovaries exhibited notable follicular degeneration and stromal disruption. - Progeny of exposed adults showed: - High rates of mortality - Gross morphological abnormalities (yolk sac edema, pericardial edema, curved axis, tail deformities) - Malformation rates increased with longer adult exposure periods - Neurobehavioral tests at 10 dpf demonstrated anxiety-like behavior in larvae from exposed parents. Conclusion The study indicates a progressive decline in reproductive health among adults and increased developmental and neurobehavioral adversities in their progeny, highlighting the transgenerational risks associated with Wi-Fi RF-EMR exposure. The findings emphasize the potential long-term biological risks of widespread electromagnetic radiation exposure and underscore the need for further research into transgenerational effects. Highlights - Exposed to 4G Wi-Fi RF-EMR for 30 days, 4 h/day - Damage to gonadal histoarchitecture was observed in both sexes - Progeny expressed severe developmental and neurobehavioral alterations - Progressive, intensifying transgenerational effects documented with prolonged exposure

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AI evidence extraction

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Study typeanimal

Effect directionharm

PopulationAdult zebrafish (Danio rerio) and their progeny (embryos/larvae observed up to 10 dpf)

Sample sizeNot supplied

ExposureRF · 4 h/day for 30 days (adults); progeny maintained EMF-free

Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

Adult zebrafish exposed to Wi‑Fi RF‑EMR (4 h/day for 30 days) showed significant gonadal histopathology, including testicular abnormalities (seminiferous tubule disintegration, reduced spermatids, abnormal lumina) and ovarian follicular degeneration/stromal disruption. Progeny of exposed adults (raised EMF-free) had increased mortality and gross malformations, with malformation rates increasing with longer parental exposure, and larvae showed anxiety-like behavior at 10 dpf.

Outcomes measured

Adult gonad histomorphology/histopathology (testes, ovaries)
Reproductive health (implied via gonadal changes)
Embryo/larval mortality
Embryo/larval gross morphological abnormalities (yolk sac edema, pericardial edema, curved axis, tail deformities)
Larval neurobehavior at 10 dpf (anxiety-like behavior)
Malformation rate vs adult exposure duration (10th/20th/30th day breeding)

Limitations

Frequency and dosimetry (e.g., SAR/power density) not reported in abstract
Sample size not reported in abstract
Exposure characterization details (distance to router, field strength) not reported in abstract
Mechanistic endpoints not described in abstract

View raw extracted JSON

{
  "study_type": "animal",
  "exposure": {
    "band": "RF",
    "source": "Wi‑Fi router (4G Wi‑Fi router)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "4 h/day for 30 days (adults); progeny maintained EMF-free"
  },
  "population": "Adult zebrafish (Danio rerio) and their progeny (embryos/larvae observed up to 10 dpf)",
  "sample_size": null,
  "outcomes": [
    "Adult gonad histomorphology/histopathology (testes, ovaries)",
    "Reproductive health (implied via gonadal changes)",
    "Embryo/larval mortality",
    "Embryo/larval gross morphological abnormalities (yolk sac edema, pericardial edema, curved axis, tail deformities)",
    "Larval neurobehavior at 10 dpf (anxiety-like behavior)",
    "Malformation rate vs adult exposure duration (10th/20th/30th day breeding)"
  ],
  "main_findings": "Adult zebrafish exposed to Wi‑Fi RF‑EMR (4 h/day for 30 days) showed significant gonadal histopathology, including testicular abnormalities (seminiferous tubule disintegration, reduced spermatids, abnormal lumina) and ovarian follicular degeneration/stromal disruption. Progeny of exposed adults (raised EMF-free) had increased mortality and gross malformations, with malformation rates increasing with longer parental exposure, and larvae showed anxiety-like behavior at 10 dpf.",
  "effect_direction": "harm",
  "limitations": [
    "Frequency and dosimetry (e.g., SAR/power density) not reported in abstract",
    "Sample size not reported in abstract",
    "Exposure characterization details (distance to router, field strength) not reported in abstract",
    "Mechanistic endpoints not described in abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "RF-EMR",
    "Wi‑Fi",
    "zebrafish",
    "Danio rerio",
    "reproduction",
    "gonad histopathology",
    "transgenerational effects",
    "developmental toxicity",
    "malformations",
    "mortality",
    "neurobehavior",
    "anxiety-like behavior"
  ],
  "suggested_hubs": [
    {
      "slug": "school-wi-fi",
      "weight": 0.62,
      "reason": "Study examines biological effects of Wi‑Fi RF‑EMR exposure (router-based), relevant to Wi‑Fi exposure discussions."
    }
  ]
}

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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: 10.1016/j.scitotenv.2025.180982
PubMed: 41264945

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