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Fertilizability of oocytes derived from Holstein cows having different antral follicle counts in ovaries
This item is licensed under:Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
| Title: | Fertilizability of oocytes derived from Holstein cows having different antral follicle counts in ovaries |
| Authors: | Nagai, Katsuhisa Browse this author | | Yanagawa, Yojiro Browse this author | | Katagiri, Seiji Browse this author →KAKEN DB | | Nagano, Masashi Browse this author →KAKEN DB |
| Keywords: | Dairy cattle | | Ovarian reserve | | Antral follicle count | | Ovum pick-up | | Oocyte quality |
| Issue Date: | Dec-2015 |
| Publisher: | Elsevier |
| Journal Title: | Animal Reproduction Science |
| Volume: | 163 |
| Start Page: | 172 |
| End Page: | 178 |
| Publisher DOI: | 10.1016/j.anireprosci.2015.11.009 |
| PMID: | 26588889 |
| Abstract: | In this study, to clarify the relationship between ovarian reserve and oocyte quality, cumulus-oocyte complexes (COCs) were collected repeatedly by ovum pick-up (OPU) from cows with high and low antral follicle counts (AFCs) at short (3–4 days) and long (7 days) intervals, and COC morphologies and oocyte fertilizability were examined. The relationship between AFC and follicular growth after OPU was also investigated. Cows showing AFC of ≥30 in at least one OPU session were grouped into the high-AFC group. At a short interval, follicular sizes and COC morphologies were similar between the different AFC groups. However, the normal fertilization rate was higher in the high-AFC group than in the low one, although total penetration rates were similar. At a long interval, the percentage of COCs with poor morphology in the high-AFC group was higher and the normal fertilization rate was lower than in the low one. In the low-AFC group, normal fertilization rates at short and long intervals were similar, and mean follicular size became larger at a long than at a short interval. However, mean follicular sizes at short- and long-interval OPU were similar in the high-AFC group. In conclusion, it is suggested that oocytes derived from cows with high AFC had higher fertilizability than those from cows with low AFC when OPUs were performed at a short (3–4 days) interval. However, oocyte quality in high-AFC cows was impaired by long-interval (7 days) OPU, possibly due to the degradation of follicles. |
| Rights: | ©2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/63729 |
| 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: 永野 昌志
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