Seasonal infertility in large pig production units in an Eastern-European climate
Abstract
OBJECTIVES: To demonstrate the occurrence of seasonal infertility of sows in large production units in Eastern Europe. DESIGN: Weaners in this trial originated from a 1000 sow Croatian herd that weaned piglets at 14 or 28 days of age. The production records of 15 indoor (795 to 1849 sows per herd) pig farms with identical feeding, similar genetics and health status, were evaluated. The reproductive performance of sows when the average daily (9 am to 4 pm) temperature was more than 35 degrees C, was compared with the weeks when it was lower than 30 degrees C. RESULTS: During periods of high temperature (> 35 degrees C) sows had significantly (P < or = 0.05) longer weaning to service intervals and more regular returns to service (P < or = 0.05) compared to weeks of less than 30 degrees C daily temperature in the same summer season. Irregular returns to service were low and showed no significant differences during the same time periods. Farrowing rates and total litter sizes were lower (P < or = 0.05) for periods of higher than 35 degrees C daily temperature compared to weeks of less than 30 degrees C daily temperature in the same summer season. CONCLUSION: When daily temperatures are higher than 35 degrees C, reproductive performance is likely to be depressed in large pig production units.
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Heat stress adversely affects sow reproduction, including estrus time and conception rate.
“Heat stress affects the estrus time and conception rate of sows.”
From Modeling of Heat Stress in Sows—Part 1: Establishment of the Prediction Model for the Equivalent Temperature Index of the Sows (2021) · cites this paper as [2]
Cites
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Reproductive Performance of Gilts following Heat Stress Prior to Breeding and in Early Gestation
Edwards, R. L., Omtvedt, I. T., Tuesman, E. J., et al. (1968) · Journal of Animal Science · doi:10.2527/jas1968.2761634x · Cited by 102 · see citing works
Multiple manifestations of season on reproductive performance of commercial swine
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Seasonal Influence on the Fertility of Sows and Gilts
Hurtgen, J. P., & Leman, A. D. (1980) · Journal of the American Veterinary Medical Association · doi:10.2460/javma.1980.177.07.631 · Cited by 75 · see citing works
Characterization of summer infertility of sows in large confinement units
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Reproductive Characteristics of Boars during and after Exposure to Increased Ambient Temperature2
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Cao, M., Zong, C., Wang, X., Teng, G., Zhuang, Y., & Lei, K. (2021) · Animals · doi:10.3390/ani11051472 · Cited by 19 · see citing works
“Introduction Heat stress can affect the reproductive endocrine system in sows and inhibit the ovarian function, which in turn affects estrus activity [1], causing delayed estrus, hidden estrus or even no estrus phenomenon [2].”
Background
- Authors
- ALMOND, P., & BILKEI, G.
- Venue
- Australian Veterinary Journal
- Publisher
- Wiley
- Published
- 2005-06
- Volume
- 83
- Issue
- 6
- Pages
- 344-346
- ISSN
- 0005-0423 (ISSN-L)
- 1751-0813
- OpenAlex
- W2054540042
- Cited by
- 39
- References
- 9
- Citations by year
- 2026: 1 · 2025: 2 · 2024: 1 · 2023: 3 · 2022: 2 · 2021: 5 · 2020: 1 · 2019: 1 · 2018: 1 · 2017: 1 · 2016: 4 · 2014: 4 · 2013: 1 · 2012: 1
- FWCI
- 3.45
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Australian Veterinary Journal (publishedVersion)
- PubMed (publishedVersion)
- 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
- seasonal infertility, sow reproductive performance, heat stress, high ambient temperature, farrowing rate, litter size, Eastern Europe
- MeSH terms
- Animals, Climate, Female, Hot Temperature, Infertility, Female, Insemination, Artificial, Pregnancy, Reproduction, Seasons, Swine, Swine Diseases, Switzerland, Heat Stress Disorders
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