Comparison between the 5-day cosynch and 7-day estradiol-based protocols for synchronization of ovulation and timed artificial insemination in suckled BOS taurus BEEF cows
The objective was to compare pregnancy per AI and follicular dynamic in suckled Bos taurus beef cows treated with either a 7-day progesterone + estradiol-based protocol or a 5-day progesterone CoSynch protocol for timed artificial insemination (TAI) during four breeding seasons. We hypothesized that...
| Main Authors: | , , , , , , , , |
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| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
| Published: |
Elsevier
2019
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.12123/6371 https://www.sciencedirect.com/science/article/pii/S0093691X1830387X https://doi.org/10.1016/j.theriogenology.2019.01.027 |
| _version_ | 1855035663510929408 |
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| author | Bilbao, María Guillermina Zapata, Luis Romero Harry, Hernan Wallace Perez, Santiago Farcey, Florencia Gelid, Lucas Fernando Palmares, Roberto Ferrer, María Bartolome, Julián Alberto |
| author_browse | Bartolome, Julián Alberto Bilbao, María Guillermina Farcey, Florencia Ferrer, María Gelid, Lucas Fernando Palmares, Roberto Romero Harry, Hernan Wallace Perez, Santiago Zapata, Luis |
| author_facet | Bilbao, María Guillermina Zapata, Luis Romero Harry, Hernan Wallace Perez, Santiago Farcey, Florencia Gelid, Lucas Fernando Palmares, Roberto Ferrer, María Bartolome, Julián Alberto |
| author_sort | Bilbao, María Guillermina |
| collection | INTA Digital |
| description | The objective was to compare pregnancy per AI and follicular dynamic in suckled Bos taurus beef cows treated with either a 7-day progesterone + estradiol-based protocol or a 5-day progesterone CoSynch protocol for timed artificial insemination (TAI) during four breeding seasons. We hypothesized that estrous cycle status, days postpartum (DPP), fat depth and plasma progesterone concentration differentially modify the effect of treatments. Every year, 9 days before initiation of each breeding season, cows were randomly assigned to one of two groups. Cows in the 7-d P + E group (n = 428) received a progesterone intravaginal device (DIB) and estradiol benzoate on Day −9. On Day −2 the device was removed, and cows received cloprostenol and estradiol cypionate. Forty-eight hours later (Day 0) cows received TAI. Cows in the 5-d P + CoS group (n = 428) received a DIB, and GnRH on Day −8. On Day −3, the device was removed, and cows received cloprostenol. A second dose of cloprostenol was given on Day −2. Cows received GnRH and TAI 72 h after device removal (Day 0). On Day −9, estrous cycle status was determined. In a subset of cows (n = 79) the size of the dominant follicle was determined between Days −2 and 0. In another subset of cows (n = 340), DPP, fat depth (mm) and plasma progesterone concentration (ng/mL) were evaluated on Day −9. Pregnancy per AI was determined 30 d after TAI. Pregnancy per AI was greater for cows in the 5-d P + CoS group than for cows in the 7-d P + E group (50.9% vs. 41.3%, P = 0.01) and was also greater in cyclic than in anestrus cows (54.3% vs. 33.2%, P < 0.0001). There was also a significant effect of breeding season (P = 0.0002) and sire (P = 0.03), and an interaction between treatment group and breeding season (P = 0.03). The dominant follicle was larger (P < 0.0001) in cows in the 5-d P + CoS group than the 7-d P + E group (10.7 ± 0.29 mm vs. 9.0 ± 0.28 mm). Pregnancy per AI was greater in cows with ≥55 DPP (47.0% vs. 29.6%, P = 0.001), fat depth ≥0.50 mm (44.7% vs. 29.7%), and with plasma progesterone concentration ≥1 ng/mL (47.2% vs. 28.7%, P = 0.01). In cows with plasma progesterone ≥1 ng/mL on Day −9, pregnancy per AI was greater in the 5-d P + CoS group (60.5%) than in the 7-d P + E group (34.9%), but there was no difference between treatment groups in cows with plasma progesterone < 1 ng/mL (P = 0.07). In conclusion, the 5-d P + CoS protocol resulted in greater size of the dominant follicle and pregnancy per AI in suckled Bos taurus beef cows subjected to TAI. |
| format | info:ar-repo/semantics/artículo |
| id | INTA6371 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA63712023-03-14T17:01:45Z Comparison between the 5-day cosynch and 7-day estradiol-based protocols for synchronization of ovulation and timed artificial insemination in suckled BOS taurus BEEF cows Bilbao, María Guillermina Zapata, Luis Romero Harry, Hernan Wallace Perez, Santiago Farcey, Florencia Gelid, Lucas Fernando Palmares, Roberto Ferrer, María Bartolome, Julián Alberto Repoducción Inseminación Artificial Tratados Vacas de Cría Estradiol Sincronización Ovulación Synchronization Ovulation Treaties Artificial Insemination Suckler Cows Reproduction The objective was to compare pregnancy per AI and follicular dynamic in suckled Bos taurus beef cows treated with either a 7-day progesterone + estradiol-based protocol or a 5-day progesterone CoSynch protocol for timed artificial insemination (TAI) during four breeding seasons. We hypothesized that estrous cycle status, days postpartum (DPP), fat depth and plasma progesterone concentration differentially modify the effect of treatments. Every year, 9 days before initiation of each breeding season, cows were randomly assigned to one of two groups. Cows in the 7-d P + E group (n = 428) received a progesterone intravaginal device (DIB) and estradiol benzoate on Day −9. On Day −2 the device was removed, and cows received cloprostenol and estradiol cypionate. Forty-eight hours later (Day 0) cows received TAI. Cows in the 5-d P + CoS group (n = 428) received a DIB, and GnRH on Day −8. On Day −3, the device was removed, and cows received cloprostenol. A second dose of cloprostenol was given on Day −2. Cows received GnRH and TAI 72 h after device removal (Day 0). On Day −9, estrous cycle status was determined. In a subset of cows (n = 79) the size of the dominant follicle was determined between Days −2 and 0. In another subset of cows (n = 340), DPP, fat depth (mm) and plasma progesterone concentration (ng/mL) were evaluated on Day −9. Pregnancy per AI was determined 30 d after TAI. Pregnancy per AI was greater for cows in the 5-d P + CoS group than for cows in the 7-d P + E group (50.9% vs. 41.3%, P = 0.01) and was also greater in cyclic than in anestrus cows (54.3% vs. 33.2%, P < 0.0001). There was also a significant effect of breeding season (P = 0.0002) and sire (P = 0.03), and an interaction between treatment group and breeding season (P = 0.03). The dominant follicle was larger (P < 0.0001) in cows in the 5-d P + CoS group than the 7-d P + E group (10.7 ± 0.29 mm vs. 9.0 ± 0.28 mm). Pregnancy per AI was greater in cows with ≥55 DPP (47.0% vs. 29.6%, P = 0.001), fat depth ≥0.50 mm (44.7% vs. 29.7%), and with plasma progesterone concentration ≥1 ng/mL (47.2% vs. 28.7%, P = 0.01). In cows with plasma progesterone ≥1 ng/mL on Day −9, pregnancy per AI was greater in the 5-d P + CoS group (60.5%) than in the 7-d P + E group (34.9%), but there was no difference between treatment groups in cows with plasma progesterone < 1 ng/mL (P = 0.07). In conclusion, the 5-d P + CoS protocol resulted in greater size of the dominant follicle and pregnancy per AI in suckled Bos taurus beef cows subjected to TAI. Estación Experimental Agropecuaria Anguil Fil: Bilbao, Guillermina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Pampa. Facultad de Ciencias Veterinarias; Argentina Fil: Zapata, Luis. Universidad Nacional de La Pampa. Facultad de Ciencias Veterinarias; Argentina Fil: Romero Harry, Hernan. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina Fil: Wallace Perez, Santiago. Zoetis SRL; Argentina Fil: Farcey, Florencia. Universidad Nacional de La Pampa. Facultad de Ciencias Veterinarias; Argentina Fil: Gelid, Lucas. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina Fil: Palomares, Roberto. University of Georgia. College of Veterinary Medicine. Department of Large Animal Medicine and Population Health; Estados Unidos Fil: Ferrer, María. University of Georgia. College of Veterinary Medicine. Department of Large Animal Medicine and Population Health; Estados Unidos Fil: Bartolome, Julian. Universidad Nacional de La Pampa. Facultad de Ciencias Veterinarias; Argentina 2019-11-22T15:18:46Z 2019-11-22T15:18:46Z 2019-06-01 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/6371 https://www.sciencedirect.com/science/article/pii/S0093691X1830387X 0093-691X https://doi.org/10.1016/j.theriogenology.2019.01.027 eng info:eu-repo/semantics/restrictedAccess application/pdf Elsevier Theriogenology 131 : 72-78 (June 2019) |
| spellingShingle | Repoducción Inseminación Artificial Tratados Vacas de Cría Estradiol Sincronización Ovulación Synchronization Ovulation Treaties Artificial Insemination Suckler Cows Reproduction Bilbao, María Guillermina Zapata, Luis Romero Harry, Hernan Wallace Perez, Santiago Farcey, Florencia Gelid, Lucas Fernando Palmares, Roberto Ferrer, María Bartolome, Julián Alberto Comparison between the 5-day cosynch and 7-day estradiol-based protocols for synchronization of ovulation and timed artificial insemination in suckled BOS taurus BEEF cows |
| title | Comparison between the 5-day cosynch and 7-day estradiol-based protocols for synchronization of ovulation and timed artificial insemination in suckled BOS taurus BEEF cows |
| title_full | Comparison between the 5-day cosynch and 7-day estradiol-based protocols for synchronization of ovulation and timed artificial insemination in suckled BOS taurus BEEF cows |
| title_fullStr | Comparison between the 5-day cosynch and 7-day estradiol-based protocols for synchronization of ovulation and timed artificial insemination in suckled BOS taurus BEEF cows |
| title_full_unstemmed | Comparison between the 5-day cosynch and 7-day estradiol-based protocols for synchronization of ovulation and timed artificial insemination in suckled BOS taurus BEEF cows |
| title_short | Comparison between the 5-day cosynch and 7-day estradiol-based protocols for synchronization of ovulation and timed artificial insemination in suckled BOS taurus BEEF cows |
| title_sort | comparison between the 5 day cosynch and 7 day estradiol based protocols for synchronization of ovulation and timed artificial insemination in suckled bos taurus beef cows |
| topic | Repoducción Inseminación Artificial Tratados Vacas de Cría Estradiol Sincronización Ovulación Synchronization Ovulation Treaties Artificial Insemination Suckler Cows Reproduction |
| url | http://hdl.handle.net/20.500.12123/6371 https://www.sciencedirect.com/science/article/pii/S0093691X1830387X https://doi.org/10.1016/j.theriogenology.2019.01.027 |
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