[State of the reproductive systemin in male rats of 1st generation obtained from irradiated parents and exposed to electromagnetic radiation (897 MHz) during embryogenesis and postnatal development].

{
  "study_type": "animal",
  "exposure": {
    "band": "RF",
    "source": "mobile phone",
    "frequency_mhz": 897,
    "sar_wkg": null,
    "duration": "8 h/day (prolonged exposure during embryogenesis/ontogeny and postnatal development)"
  },
  "population": "Male rats (1st generation) obtained from irradiated parents; exposed during embryogenesis and postnatal development",
  "sample_size": null,
  "outcomes": [
    "number of births",
    "sex ratio",
    "male sexual development timing",
    "spermatogenesis cell-stage distribution",
    "number of mature spermatozoa",
    "sperm viability"
  ],
  "main_findings": "Prolonged 897 MHz exposure (8 h/day) was associated with fewer births and a sex ratio shift toward more males. In male offspring, exposure was reported to accelerate sexual development by 2 months of age and to alter spermatogenesis with disproportionate cell numbers across stages, increasing mature spermatozoa but decreasing their viability.",
  "effect_direction": "harm",
  "limitations": [
    "Sample size not reported in abstract",
    "Dosimetry/SAR not reported in abstract",
    "Details of exposure setup and control conditions not described in abstract",
    "Outcome measurement methods and statistical details not provided in abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.72,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "rat",
    "male reproductive system",
    "spermatogenesis",
    "sperm viability",
    "sexual development",
    "prenatal exposure",
    "postnatal exposure",
    "mobile phone radiation",
    "897 MHz",
    "RF-EMR"
  ],
  "suggested_hubs": [
    {
      "slug": "mobile-phones",
      "weight": 0.9,
      "reason": "Exposure described as electromagnetic radiation from cellular phone at 897 MHz."
    }
  ]
}