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Body temperature fluctuations in the periparturient horse mare
D T Cross1, W R Threlfall, R C Kline
1Department of Animal Science The Ohio State University, Columbus, OH 43210 USA.
Theriogenology
|May 1, 1992
Summary
Mare body temperature drops significantly before foaling and rises sharply after birth, offering insights into equine parturition. This study tracked temperature changes in mares using biotelemetry.
Area of Science:
- Veterinary Science
- Animal Physiology
Background:
- Parturition in mares involves complex physiological changes.
- Monitoring deep body temperature can provide critical insights into the parturition process.
Purpose of the Study:
- To investigate the temporal patterns of deep body temperature fluctuations in mares during parturition.
- To utilize biotelemetry for continuous temperature monitoring around the time of foaling.
Main Methods:
- Implantation of radio transmitters in six mares for deep body temperature monitoring.
- Continuous data collection for 336 hours, centered around the parturition event (-168 to 168 hours).
- Analysis of hourly temperature data using statistical methods.
Main Results:
- A significant decrease in body temperature (0.76°C) commenced 4 hours pre-parturition.
- The lowest mean body temperature (36.58°C) was recorded at the time of parturition.
- An elevated body temperature (peaking at 38.02°C) was observed from 1 hour post-partum for 48 hours.
Conclusions:
- Deep body temperature patterns provide a reliable indicator of impending parturition in mares.
- Post-partum hyperthermia is a normal physiological response in mares.
- Biotelemetry is an effective tool for studying parturition-related physiological changes in horses.
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