Follicular dynamics during the pre-ovulatory and subsequent first follicular wave stages affect the pregnancy outcome in Japanese Black cows
The diameters of the pre-ovulatory follicles (PF) and the largest follicle during the subsequent first follicular wave (W1LF), and plasma estradiol-17β (E2) concentrations were monitored on Days 0, 1, 3, 5, and 7 (ovulation = Day 1). Pregnancy was diagnosed on Day 30. Cows were classified into two g...
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| Format: | Article |
| Language: | English |
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The Society for Reproduction and Development
2021-09-01
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| Series: | The Journal of Reproduction and Development |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jrd/67/6/67_2021-024/_pdf/-char/en |
| _version_ | 1797615792873799680 |
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| author | Tsumugi YOSHIYAMA Tomomi KANAZAWA Toru TAKAHASHI |
| author_facet | Tsumugi YOSHIYAMA Tomomi KANAZAWA Toru TAKAHASHI |
| author_sort | Tsumugi YOSHIYAMA |
| collection | DOAJ |
| description | The diameters of the pre-ovulatory follicles (PF) and the largest follicle during the subsequent first follicular wave (W1LF), and plasma estradiol-17β (E2) concentrations were monitored on Days 0, 1, 3, 5, and 7 (ovulation = Day 1). Pregnancy was diagnosed on Day 30. Cows were classified into two groups according to the location of the dominant follicle ipsilateral (IG) or contralateral (CG) to the corpus luteum on Day 7. From Days 3 to 7, some follicles that had been determined as the subordinate in the previous examination exceeded the W1LF located in the opposite ovary in terms of the diameter. These were defined as switching (SW), whereas others were defined as non-switching (NSW). The diameter of PF was significantly smaller in pregnant (P) animals than in non-pregnant (NP) animals. The plasma E2 concentration on Day 0 was significantly higher in P animals than in NP animals and tended to be higher in NSW than in SW. In addition, plasma E2 concentrations around Days 3 to 7 tended to be higher in P animals of NSW than in NP animals of SW. The conception rates did not differ between IG and CG but were significantly higher in NSW than in SW. In the IG group, the conception rate tended to be higher in NSW than in SW. |
| first_indexed | 2024-03-11T07:30:46Z |
| format | Article |
| id | doaj.art-7236d24f04c04493a4a0d50cea5189ee |
| institution | Directory Open Access Journal |
| issn | 0916-8818 1348-4400 |
| language | English |
| last_indexed | 2024-03-11T07:30:46Z |
| publishDate | 2021-09-01 |
| publisher | The Society for Reproduction and Development |
| record_format | Article |
| series | The Journal of Reproduction and Development |
| spelling | doaj.art-7236d24f04c04493a4a0d50cea5189ee2023-11-17T07:18:03ZengThe Society for Reproduction and DevelopmentThe Journal of Reproduction and Development0916-88181348-44002021-09-0167634535110.1262/jrd.2021-024jrdFollicular dynamics during the pre-ovulatory and subsequent first follicular wave stages affect the pregnancy outcome in Japanese Black cowsTsumugi YOSHIYAMA0Tomomi KANAZAWA1Toru TAKAHASHI2Graduate School of Veterinary Sciences, Iwate University, Iwate 020-8550, JapanCooperative Department of Veterinary Medicine, Iwate University, Iwate 020-8550, JapanGraduate School of Veterinary Sciences, Iwate University, Iwate 020-8550, JapanThe diameters of the pre-ovulatory follicles (PF) and the largest follicle during the subsequent first follicular wave (W1LF), and plasma estradiol-17β (E2) concentrations were monitored on Days 0, 1, 3, 5, and 7 (ovulation = Day 1). Pregnancy was diagnosed on Day 30. Cows were classified into two groups according to the location of the dominant follicle ipsilateral (IG) or contralateral (CG) to the corpus luteum on Day 7. From Days 3 to 7, some follicles that had been determined as the subordinate in the previous examination exceeded the W1LF located in the opposite ovary in terms of the diameter. These were defined as switching (SW), whereas others were defined as non-switching (NSW). The diameter of PF was significantly smaller in pregnant (P) animals than in non-pregnant (NP) animals. The plasma E2 concentration on Day 0 was significantly higher in P animals than in NP animals and tended to be higher in NSW than in SW. In addition, plasma E2 concentrations around Days 3 to 7 tended to be higher in P animals of NSW than in NP animals of SW. The conception rates did not differ between IG and CG but were significantly higher in NSW than in SW. In the IG group, the conception rate tended to be higher in NSW than in SW.https://www.jstage.jst.go.jp/article/jrd/67/6/67_2021-024/_pdf/-char/enconception ratecowestradiol-17βfirst-wave dominant follicleswitching |
| spellingShingle | Tsumugi YOSHIYAMA Tomomi KANAZAWA Toru TAKAHASHI Follicular dynamics during the pre-ovulatory and subsequent first follicular wave stages affect the pregnancy outcome in Japanese Black cows The Journal of Reproduction and Development conception rate cow estradiol-17β first-wave dominant follicle switching |
| title | Follicular dynamics during the pre-ovulatory and subsequent first follicular wave stages affect the pregnancy outcome in Japanese Black cows |
| title_full | Follicular dynamics during the pre-ovulatory and subsequent first follicular wave stages affect the pregnancy outcome in Japanese Black cows |
| title_fullStr | Follicular dynamics during the pre-ovulatory and subsequent first follicular wave stages affect the pregnancy outcome in Japanese Black cows |
| title_full_unstemmed | Follicular dynamics during the pre-ovulatory and subsequent first follicular wave stages affect the pregnancy outcome in Japanese Black cows |
| title_short | Follicular dynamics during the pre-ovulatory and subsequent first follicular wave stages affect the pregnancy outcome in Japanese Black cows |
| title_sort | follicular dynamics during the pre ovulatory and subsequent first follicular wave stages affect the pregnancy outcome in japanese black cows |
| topic | conception rate cow estradiol-17β first-wave dominant follicle switching |
| url | https://www.jstage.jst.go.jp/article/jrd/67/6/67_2021-024/_pdf/-char/en |
| work_keys_str_mv | AT tsumugiyoshiyama folliculardynamicsduringthepreovulatoryandsubsequentfirstfollicularwavestagesaffectthepregnancyoutcomeinjapaneseblackcows AT tomomikanazawa folliculardynamicsduringthepreovulatoryandsubsequentfirstfollicularwavestagesaffectthepregnancyoutcomeinjapaneseblackcows AT torutakahashi folliculardynamicsduringthepreovulatoryandsubsequentfirstfollicularwavestagesaffectthepregnancyoutcomeinjapaneseblackcows |