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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine >
Peer-reviewed Journal Articles, etc >
Relationship between bovine endometrial thickness and plasma progesterone and estradiol concentrations in natural and induced estrus
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| Title: | Relationship between bovine endometrial thickness and plasma progesterone and estradiol concentrations in natural and induced estrus |
| Authors: | Sugiura, Tomochika Browse this author | | Akiyoshi, Shun Browse this author | | Inoue, Fumihiro Browse this author | | Yanagawa, Yojiro Browse this author | | Moriyoshi, Masaharu Browse this author →KAKEN DB | | Tajima, Motoshi Browse this author →KAKEN DB | | Katagiri, Seiji Browse this author →KAKEN DB |
| Keywords: | Dairy cows | | Edema | | Endometrium | | Estrous cycle | | Ultrasonography |
| Issue Date: | Apr-2018 |
| Publisher: | Society for Reproduction and Development（SRD） |
| Journal Title: | Journal of reproduction and development |
| Volume: | 64 |
| Issue: | 2 |
| Start Page: | 135 |
| End Page: | 143 |
| Publisher DOI: | 10.1262/jrd.2017-139 |
| Abstract: | The objective of this study was to investigate cyclical changes in endometrial thickness in relation to progesterone (P-4) and estradiol-17 beta (E-2) concentrations during natural and induced estrus in 15 cows. In the prostaglandin (PG) F-2 alpha induced estrus group, ultrasonography (USG) at 6-h intervals was used to determine endometrial thickness 48-24 h before the PGF(2 alpha), treatment until 24 h after ovulation (ovulation = Day 0). In the natural estrus group, USG was performed every 48 h from Day 3 to Days 15-18 after the first ovulation, and then every 6 h until 24 h after ovulation. Endometrial thickness was standardized using Day 13 as a reference day. Blood was collected during every USG examination and plasma P-4 and E-2 concentrations were determined. Endometrial thickness of the induced estrus group (n = 11) was greater than that of the natural estrus group (n = 9) between 60 and 12 h before ovulation (P < 0.05). In the natural estrus group, prior to an increase in endometrial thickness, a decrease in P-4 and an increase in E-2 were detected. In the induced estrus group, based on the time of ovulation, an increase in endometrial thickness was detected at the same time of a decrease in P-4 before an increase in E-2. These results suggest that decreases in P-4 concentrations may be a cue to changes in endometrial thickness, while increases in E-2 concentrations appear to sustain and/or enhance these changes. |
| Rights: | © 2018 by the Society for Reproduction and Development | | https://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/70979 |
| Appears in Collections: | 獣医学院・獣医学研究院 (Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 片桐 成二
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