{
  "id": 3504836,
  "title": "Combat-like stress in fathers alters brain chemistry in offspring",
  "url": "https://urgent.news/2026/08/26/combat-like-stress-in-fathers-alters-brain-chemistry-in-offspring",
  "topic": "health",
  "section": "Health & Medicine",
  "published": "2026-08-26T12:00:49.000Z",
  "source": {
    "name": "PsyPost",
    "slug": "psypost",
    "url": "https://www.psypost.org/traumatic-stress-in-fathers-alters-the-brain-chemistry-and-behavior-of-their-off/"
  },
  "original_language": "en",
  "account": "A recent study published in Neurobiology of Stress reveals that fathers who experience severe trauma before conceiving can pass on biological and behavioral changes to their offspring. The research, conducted by Glenn R. Yamakawa, Richelle Mychasiuk, and their colleagues, used an animal model to simulate the sensory and physical overload of combat experienced by male rats. Over three weeks, the trauma group underwent a series of intense stressors, including visual threats, unfamiliar scents, loud noises, and physical restraint, as well as a mild traumatic brain injury resembling a concussion. These experiences led to heightened stress hormone levels, heightened anxiety, and altered gene expression in the traumatized male rats. When these fathers mated with control females, their offspring displayed pronounced behavioral differences, such as elevated anxiety, increased aggressive social play, and altered sensitivity to pain. The offspring also exhibited physical changes in their brains and adrenal glands, including shortened telomeres and altered expression of genes related to dopamine and serotonin neurotransmitters. While the secondary stressor in adolescence did not significantly exacerbate these effects, it did interact with the paternal trauma to alter certain behaviors, such as increased sugar consumption. The study highlights the potential impact of paternal stress on future generations' physical and mental health, emphasizing the importance of understanding how trauma can be inherited biologically.",
  "summary": "Fathers who experience severe trauma before conception can pass biological and behavioral changes to their offspring. A new animal study reveals that combat-like stress in males alters the pain perception, social behavior, and brain chemistry of their descendants.",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}