Definition of a seasonal infertility problem in pigs
Abstract
A summer infertility problem was investigated on a large intensive piggery in a warm temperate climatic zone in Eastern Australia. The period of infertility correlates with the period of summer heat stress. The infertility problem was manifest as a delayed return of sows to oestrus after mating and an increase in the number of sows found non-pregnant when due to farrow. Litter size was apparently not adversely affected. Gilts and first parity sows were most frequently involved. The subsequent breeding performance of sows affected by this infertility problem was quite normal. There was no apparent effect of heat stress on the boars. It is proposed that the infertility is caused by heat stress imposed more than seven days after mating causing whole litter loss and the return of the sow to oestrus.
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Periods of heat stress greatly contribute to the seasonal deaths of pigs.
“Most importantly, periods of HS greatly contributed to the seasonal deaths of pigs (Love, 1978; D ' Allaire, Drolet, & Brodeur, 1996).”
From A two-node mechanistic thermophysiological model for pigs reared in hot climates – Part 1: Physiological responses and model development (2021) · cites this paper as Love, 1978
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Physiological consequences of heat stress in pigs
Ross, J. W., Hale, B. J., Gabler, N. K., Rhoads, R. P., Keating, A. F., & Baumgard, L. H. (2015) · Animal Production Science · doi:10.1071/an15267 · Cited by 202 · see citing works
Physiological mechanisms through which heat stress compromises reproduction in pigs
Ross, J. W., Hale, B. J., Seibert, J. T., Romoser, M. R., Adur, M. K., Keating, A. F., & Baumgard, L. H. (2017) · Molecular Reproduction and Development · doi:10.1002/mrd.22859 · Cited by 128 · see citing works
Huang, T., Rong, L., Zhang, G., Brandt, P., Bjerg, B., Pedersen, P., & Granath, S. W. Y. (2021) · Biosystems Engineering · doi:10.1016/j.biosystemseng.2021.08.024 · Cited by 13 · see citing works
- Authors
- Love, R.
- Corresponding author
- Love, R.
- Venue
- Veterinary Record
- Publisher
- Wiley
- Published
- 1978-11-11
- Volume
- 103
- Issue
- 20
- Pages
- 443-446
- ISSN
- 0042-4900 (ISSN-L)
- 2042-7670
- OpenAlex
- W2143731626
- Cited by
- 108
- References
- 0
- Citations by year
- 2026: 3 · 2025: 1 · 2024: 3 · 2023: 4 · 2022: 6 · 2021: 2 · 2020: 6 · 2019: 3 · 2018: 1 · 2017: 4 · 2016: 4 · 2015: 2 · 2014: 2 · 2013: 2 · 2012: 2
- FWCI
- 3.93
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Veterinary Record (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Reproductive Physiology in Livestock
- Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Effects of Environmental Stressors on Livestock
- Health Sciences › Medicine › Reproductive Medicine › Sperm and Testicular Function
- Keywords
- seasonal infertility, heat stress, sows, estrus, litter loss, non-pregnancy, litter size, gilts, boars, breeding performance, summer heat stress
- MeSH terms
- Age Factors, Animals, Estrus, Female, Fertility, Infertility, Female, Litter Size, Male, Pregnancy, Seasons, Swine, Swine Diseases
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