Vaginal temperature is not related to the time of ovulation in sows |
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| Affiliation: | 1. Copenhagen Cystic Fibrosis Center, Department of Infectious Diseases, Rigshospitalet, Copenhagen University Hospital, Blegdamsvej 9, DK2100 Copenhagen, Denmark;2. Dept. of Medicine, Endocrine Division, Zealand University Hospital, Lykkebaekvej 1, DK4600 Koege, Denmark;3. Dept. of Clinical Physiology, Nuclear Medicine and PET, Rigshospitalet, Blegdamsvej 9, Copenhagen University Hospital, DK2100 Copenhagen, Denmark;4. Copenhagen Cystic Fibrosis Center, Danish Pediatric Pulmonary Service, Copenhagen University Hospital, Juliane Maries Vej 6, DK2100 Copenhagen, Denmark;5. Dept of Clinical Biochemistry, Rigshospitalet, Copenhagen University Hospital, Valdemar Hansens Vej 13, 2600 Glostrup, Copenhagen, Denmark;6. Dept. of Clinical Microbiology, Rigshospitalet, Copenhagen University Hospital, Ole Maaløes Vej, 26, DK2200 Copenhagen, Denmark;7. Institute for Inflammation Research, Center for Rheumatology and Spine Diseases, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, DK2100 Copenhagen, Denmark;8. The Centre of Inflammation and Metabolism (CIM), Centre for Physical Activity Research (CFAS), Rigshospitalet, Copenhagen University Hospital, Blegdamsvej 9, DK2100 Copenhagen, Denmark;2. National Swine Registry, West Lafayette, IN 47906;3. Whiteshire Hamroc LLC, Albion, IN 46701 |
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| Abstract: | ![]()
The relationship between vaginal temperature and ovulation time was studied in sows. The vaginal temperature was measured continuously between Day 4 and Day 10 after Altrenogest-treatment in 10 sows. Oestrus was checked with a vasectomized boar at 8-h intervals, and during oestrus, ovulation time was checked with transrectal ultrasonography at 2-h intervals between 07:00 h and 23:00 h. Two sows ovulated between 23:00 h and 07:00 h, and these sows were taken out of the experiment. In the eight remaining sows, a clear day/night rhythm in vaginal temperature was found: between 03:00 h and 09:00 h, vaginal temperature (LSM ± sem, corrected for sow) was on average 38.2 ± 0.01°C; between 15:00 h and 21:00 h, vaginal temperature was on average 38.5 ± 0.01°C (P < 0.001). Between 4 days before ovulation and 2 days after ovulation, no changes in temperature could be found that were related to ovulation time in any of the sows. Therefore, in sows, changes in vaginal temperature cannot be used as a predictor for ovulation time, and consequently cannot be used to predict the best time for insemination. |
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