Study links maternal stress history to later immune changes in sows

A new study in Animals adds to evidence that stress during gestation can shape pigs’ immune and stress responses long after birth, and may even carry into the next generation. In related work from the same Oklahoma State University research group, researchers found that prenatal stress timing mattered: offspring from sows exposed to hydrocortisone during mid-gestation showed weaker humoral immune measures and a more pro-inflammatory profile than some other groups. A 2024 Journal of Animal Science abstract from the team also reported that while prenatally stressed gilts showed limited immune differences themselves, effects were more apparent in their progeny, especially when the original maternal stress occurred in mid-gestation. (pubmed.ncbi.nlm.nih.gov)

Why it matters: For veterinary professionals working with swine systems, the takeaway is practical: maternal stress isn’t just a welfare issue in the sow barn, it may influence downstream immune resilience, stress reactivity, and possibly health performance in replacement females and piglets. Broader review literature in Frontiers in Veterinary Science notes that chronic stress in sows is linked with immunosuppression, altered HPA-axis function, poorer reproductive outcomes, and greater disease susceptibility risk in offspring, which can translate into treatment burden and antimicrobial use pressures. (frontiersin.org)

What to watch: Watch for the full peer-reviewed paper’s detailed methods and outcomes, especially whether the findings support management changes around gestation timing, gilt development, and selection of replacement females. (academic.oup.com)