Ovulatory Response of Weaned Sows to an Altered Ratio of Exogenous Gonadotrophins
At weaning, 33 mixed parity Hypor sows received either an injection of 400 IU equine chorionic gonadotrophin and 200 IU human chorionic gonadotrophin (hCG) (PG600; <i>n = </i>13), PG600 with an additional 200 IU hCG 24 h later (Gn800; <i>n = </i>11), or served as non-injected...
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MDPI AG
2020-02-01
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| Series: | Animals |
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| Online Access: | https://www.mdpi.com/2076-2615/10/3/380 |
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| author | Rodrigo Manjarín Jose Carlos García Lia Hoving Nicoline M. Soede Magdalena Maj Juan Carlos Dominguez de Tejerina Roy N. Kirkwood |
| author_facet | Rodrigo Manjarín Jose Carlos García Lia Hoving Nicoline M. Soede Magdalena Maj Juan Carlos Dominguez de Tejerina Roy N. Kirkwood |
| author_sort | Rodrigo Manjarín |
| collection | DOAJ |
| description | At weaning, 33 mixed parity Hypor sows received either an injection of 400 IU equine chorionic gonadotrophin and 200 IU human chorionic gonadotrophin (hCG) (PG600; <i>n = </i>13), PG600 with an additional 200 IU hCG 24 h later (Gn800; <i>n = </i>11), or served as non-injected controls (<i>n = </i>9). All gonadotrophin treated sows received an injection of 750 IU hCG at 80 h after weaning to induce ovulation (designated as time 0 h). At 0, 24, 36, 40, 44, 48, and 60 h, all sows were subject to transrectal ultrasonography to determine numbers and sizes of large (>6 mm) follicles and time of ovulation. The interval from injection of 750 IU hCG to ovulation was shorter in Gn800 compared to PG600 sows (<i>p</i> = 0.02), and more Gn800 sows had ≥9 preovulatory follicles compared to PG600 and controls (<i>p</i> = 0.02 and 0.003, respectively). Follicular cysts were evident in both PG600 and Gn800 sows. |
| first_indexed | 2024-12-19T07:04:45Z |
| format | Article |
| id | doaj.art-6643bcca9fb24f0b8d55dd06ad31a401 |
| institution | Directory Open Access Journal |
| issn | 2076-2615 |
| language | English |
| last_indexed | 2024-12-19T07:04:45Z |
| publishDate | 2020-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Animals |
| spelling | doaj.art-6643bcca9fb24f0b8d55dd06ad31a4012022-12-21T20:31:19ZengMDPI AGAnimals2076-26152020-02-0110338010.3390/ani10030380ani10030380Ovulatory Response of Weaned Sows to an Altered Ratio of Exogenous GonadotrophinsRodrigo Manjarín0Jose Carlos García1Lia Hoving2Nicoline M. Soede3Magdalena Maj4Juan Carlos Dominguez de Tejerina5Roy N. Kirkwood6Animal Science Department, California Polytechnic State University, San Luis Obispo, CA 93407, USADepartment of Medicine, Surgery and Veterinary Anatomy, University of León, Leon 24004, SpainDepartment of Animal Sciences, Wageningen University, Wageningen PB 9101, 6700, The NetherlandsDepartment of Animal Sciences, Wageningen University, Wageningen PB 9101, 6700, The NetherlandsBiological Sciences Department, California Polytechnic State University, San Luis Obispo, CA 93407, USADepartment of Medicine, Surgery and Veterinary Anatomy, University of León, Leon 24004, SpainSchool of Animal and Veterinary Sciences, University of Adelaide, Roseworthy, SA 5005, AustraliaAt weaning, 33 mixed parity Hypor sows received either an injection of 400 IU equine chorionic gonadotrophin and 200 IU human chorionic gonadotrophin (hCG) (PG600; <i>n = </i>13), PG600 with an additional 200 IU hCG 24 h later (Gn800; <i>n = </i>11), or served as non-injected controls (<i>n = </i>9). All gonadotrophin treated sows received an injection of 750 IU hCG at 80 h after weaning to induce ovulation (designated as time 0 h). At 0, 24, 36, 40, 44, 48, and 60 h, all sows were subject to transrectal ultrasonography to determine numbers and sizes of large (>6 mm) follicles and time of ovulation. The interval from injection of 750 IU hCG to ovulation was shorter in Gn800 compared to PG600 sows (<i>p</i> = 0.02), and more Gn800 sows had ≥9 preovulatory follicles compared to PG600 and controls (<i>p</i> = 0.02 and 0.003, respectively). Follicular cysts were evident in both PG600 and Gn800 sows.https://www.mdpi.com/2076-2615/10/3/380sowsgonadotrophinsfollicleovulation |
| spellingShingle | Rodrigo Manjarín Jose Carlos García Lia Hoving Nicoline M. Soede Magdalena Maj Juan Carlos Dominguez de Tejerina Roy N. Kirkwood Ovulatory Response of Weaned Sows to an Altered Ratio of Exogenous Gonadotrophins Animals sows gonadotrophins follicle ovulation |
| title | Ovulatory Response of Weaned Sows to an Altered Ratio of Exogenous Gonadotrophins |
| title_full | Ovulatory Response of Weaned Sows to an Altered Ratio of Exogenous Gonadotrophins |
| title_fullStr | Ovulatory Response of Weaned Sows to an Altered Ratio of Exogenous Gonadotrophins |
| title_full_unstemmed | Ovulatory Response of Weaned Sows to an Altered Ratio of Exogenous Gonadotrophins |
| title_short | Ovulatory Response of Weaned Sows to an Altered Ratio of Exogenous Gonadotrophins |
| title_sort | ovulatory response of weaned sows to an altered ratio of exogenous gonadotrophins |
| topic | sows gonadotrophins follicle ovulation |
| url | https://www.mdpi.com/2076-2615/10/3/380 |
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