The relationship between external auditory canal temperature and onset of estrus and ovulation in beef heifers

The aim of this study was to evaluate the relationship of body temperature fluctuations, as measured by external auditory canal temperature, to the onset of estrus and ovulation. Beef heifers (n  = 44, mean age 23.5 ± 0.4 months, mean weight 603.3 ± 5.7 kg) were fitted with a Boviminder® ear tag 2 weeks before the start of the estrous synchronization protocol to allow acclimatization. The device recorded the temperature, accurate to 0.01° Fahrenheit, every 10 min and tran smitted the data via a base station over the internet where it could be accessed remotely.

Source: Theriogenology - January 9, 2018 Category: Genetics & Stem Cells Authors: Federico Randi, Michael McDonald, Pat Duffy, Alan K. Kelly, Patrick Lonergan Source Type: research