Cited by 128Effects of Environmental Stressors on LivestockReproductive Physiology in LivestockSperm and Testicular Function

Physiological mechanisms through which heat stress compromises reproduction in pigs

Open access
Ross, Jason W., Hale, Benjamin J., Seibert, Jacob T., Romoser, Matthew R., Adur, Malavika K., Keating, Aileen F., Baumgard, Lance H.·2017·Molecular Reproduction and Development

Abstract

Seasonal variations in environmental temperatures impose added stress on domestic species bred for economically important production traits. These heat‐mediated stressors vary on a seasonal, daily, or spatial scale, and negatively impact behavior and reduce feed intake and growth rate, which inevitably lead to reduced herd productivity. The seasonal infertility observed in domestic swine is primarily characterized by depressed reproductive performance, which manifests as delayed puberty onset, reduced farrowing rates, and extended weaning‐to‐estrus intervals. Understanding the effects of heat stress at the organismal, cellular, and molecular level is a prerequisite to identifying mitigation strategies that should reduce the economic burden of compromised reproduction. In this review, we discuss the effect of heat stress on an animal's ability to maintain homeostasis in multiple systems via several hypothalamic‐pituitary‐end organ axes. Additionally, we discuss our understanding of epigenetic programming and how hyperthermia experienced in utero influences industry‐relevant postnatal phenotypes. Further, we highlight the recent recognized mechanisms by which distant tissues and organs may molecularly communicate via extracellular vesicles, a potentially novel mechanism contributing to the heat‐stress response.

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Registry

Crossref · 10.1002/mrd.22859

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138 of 138 references verified0 citation errors · 0 not checkable

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  • Respiratory rate, core body temperature, rectal temperature, skin temperature, feed, water intake and other physiological responses as well as production performance are affected by heat stress to varying levels.

    “Respiratory rate, core body temperature, rectal temperature, skin temperature, feed, water intake and other physiological responses as well as production performance (pregnancy rate, delivery times, estrus time, etc.) are affected by heat stress to varying levels [24,25,26,27,28].”
  • Conditions associated with increased insulin signaling (obesity and polycystic ovary syndrome) are associated with reproductive dysfunction.

    “Conditions associated with increased insulin signaling (such as obesity and polycystic ovary syndrome) are also associated with reproductive dysfunction [39].”

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Authors
Ross, J. W., Hale, B. J., Seibert, J. T., Romoser, M. R., Adur, M. K., Keating, A. F., & Baumgard, L. H.
Affiliations
Iowa State University (US)
Corresponding author
Ross, Jason W.
Venue
Molecular Reproduction and Development
Publisher
Wiley
Published
2017-09
Volume
84
Issue
9
Pages
934-945
ISSN
  • 1040-452X (ISSN-L)
  • 1098-2795
OpenAlex
W2725359221
Cited by
128
References
140
Citations by year
2026: 11 · 2025: 20 · 2024: 16 · 2023: 12 · 2022: 18 · 2021: 12 · 2020: 19 · 2019: 8 · 2018: 9 · 2017: 3
FWCI
1.30
Type
journal article
Language
en
Open access
Locations
  • Molecular Reproduction and Development (publishedVersion)
  • PubMed (publishedVersion)
  • Iowa State University Digital Repository (Iowa State University) (submittedVersion)
Funders
  • National Pork Board
  • Iowa Pork Producers Association
  • National Institute of Food and Agriculture (2011‐67003‐30007)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Effects of Environmental Stressors on Livestock
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Reproductive Physiology in Livestock
  • Health Sciences › Medicine › Reproductive Medicine › Sperm and Testicular Function
Keywords
heat stress, swine reproduction, seasonal infertility, puberty onset, farrowing rate, hypothalamic-pituitary-gonadal axis, hypothalamic-pituitary-adrenal axis, epigenetic programming, extracellular vesicles, inter-organ communication, thermoregulation, heat stress mitigation
MeSH terms
Animals, Female, Hypothalamo-Hypophyseal System, Infertility, Male, Swine, Swine Diseases, Heat Stress Disorders

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