Journal
JOURNAL OF REPRODUCTION AND DEVELOPMENT
Volume 66, Issue 3, Pages 271-275Publisher
SOCIETY REPRODUCTION & DEVELOPMENT-SRD
DOI: 10.1262/jrd.2019-097
Keywords
Japanese Black cow; Ovarian temperature; Ovary; Temperature gradients
Funding
- JSPS KAKENHI [19K21167]
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The reproductive performance of cattle can be suppressed by heat stress. Reproductive organ temperature, especially ovarian temperature, may affect follicle development and ovulation. The establishment of a technique for long-term measurement of ovarian temperature could prove useful in understanding the mechanisms underlying the temperature-dependent changes in follicular development and subsequent ovulation in cows. Here we report a novel method facilitating long-term and continuous recording of ovarian parenchymal temperature in cows. The method revealed that the ovarian temperature in the luteal phase was constantly maintained lower than the vaginal temperature, and that the diurnal temperature variation in the ovary was significantly greater than that in the vagina, suggesting that the ovaries may require a lower temperature than other organs to maintain their functions. This novel method could be used for the further understanding of ovarian functions during estrous cycles in cows.
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