Effect of follicle age on conception rate in beef heifers1
The objective of this study was to determine the effect of age of the ovulatory follicle on fertility in beef heifers. Ovulation was synchronized with the 5 d CO-Synch + controlled intravaginal drug release (CIDR) program in heifers in Montana (MT; n = 162, Hereford and Angus Crossbred) and Ohio (OH...
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| creator | Abreu, F. M. Cruppe, L. H. Maquivar, M. Utt, M. D. Madsen, C. A. Vasconcelos, J. L. M. Mussard, M. L. Day, M. L. Geary, T. W. |
| description | The objective of this study was to determine the effect of age of the ovulatory follicle on fertility in beef heifers. Ovulation was synchronized with the 5 d CO-Synch + controlled intravaginal drug release (CIDR) program in heifers in Montana (MT; n = 162, Hereford and Angus Crossbred) and Ohio (OH; n = 170, Angus Crossbred). All heifers received estradiol benzoate (EB; 1 mg/500 kg BW, [i.m.]) 6 d after the final GnRH of the synchronization program to induce follicular atresia and emergence of a new follicular wave (NFW) followed by prostaglandin F2... (PGF2...; 25 mg, i.m.) administration either 5 d ("young" follicle [YF]; n = 158) or 9 d ("mature" follicle [MF]; n = 174) after EB. Estrous detection was performed for 5 d after PGF2α with AI approximately 12 h after onset of estrus. Ovarian ultrasonography (MT location only) was performed in YF and MF at EB, 5 d after EB, PGF2α, and AI. Heifers in MT (n = 20) and OH (n = 18) that were not presynchronized or did not initiate a NFW were excluded from further analyses, resulting in 142 and 152 heifers in MT and OH, respectively. Heifers from the MF treatment in MT that initiated a second NFW after EB but before PGF2α (MF2; n = 14) were excluded from the primary The objective of this study was to determine The objective of this study was to determine the effect of age of the ovulatory follicle on fertility in beef heifers. Ovulation was synchronized with the 5 d CO-Synch + controlled intravaginal drug release (CIDR) program in heifers in Montana (MT; n = 162, Hereford and Angus Crossbred) and Ohio (OH; n = 170, Angus Crossbred). All heifers received estradiol benzoate (EB; 1 mg/500 kg BW, [i.m.]) 6 d after the final GnRH of the synchronization program to induce follicular atresia and emergence of a new follicular wave (NFW) followed by prostaglandin F2... (PGF2...; 25 mg, i.m.) administration either 5 d ("young" follicle [YF]; n = 158) or 9 d ("mature" follicle [MF]; n = 174) after EB. Estrous detection was performed for 5 d after PGF2α with AI approximately 12 h after onset of estrus. Ovarian ultrasonography (MT location only) was performed in YF and MF at EB, 5 d after EB, PGF2α, and AI. Heifers in MT (n = 20) and OH (n = 18) that were not presynchronized or did not initiate a NFW were excluded from further analyses, resulting in 142 and 152 heifers in MT and OH, respectively. Heifers from the MF treatment in MT that initiated a second NFW after EB but before PGF2α (MF2; n = 14) were excluded from the priwa |
| doi_str_mv | 10.2527/jas.2013-6761 |
| format | Article |
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M. ; Cruppe, L. H. ; Maquivar, M. ; Utt, M. D. ; Madsen, C. A. ; Vasconcelos, J. L. M. ; Mussard, M. L. ; Day, M. L. ; Geary, T. W.</creator><creatorcontrib>Abreu, F. M. ; Cruppe, L. H. ; Maquivar, M. ; Utt, M. D. ; Madsen, C. A. ; Vasconcelos, J. L. M. ; Mussard, M. L. ; Day, M. L. ; Geary, T. W.</creatorcontrib><description>The objective of this study was to determine the effect of age of the ovulatory follicle on fertility in beef heifers. Ovulation was synchronized with the 5 d CO-Synch + controlled intravaginal drug release (CIDR) program in heifers in Montana (MT; n = 162, Hereford and Angus Crossbred) and Ohio (OH; n = 170, Angus Crossbred). All heifers received estradiol benzoate (EB; 1 mg/500 kg BW, [i.m.]) 6 d after the final GnRH of the synchronization program to induce follicular atresia and emergence of a new follicular wave (NFW) followed by prostaglandin F2... (PGF2...; 25 mg, i.m.) administration either 5 d ("young" follicle [YF]; n = 158) or 9 d ("mature" follicle [MF]; n = 174) after EB. Estrous detection was performed for 5 d after PGF2α with AI approximately 12 h after onset of estrus. Ovarian ultrasonography (MT location only) was performed in YF and MF at EB, 5 d after EB, PGF2α, and AI. Heifers in MT (n = 20) and OH (n = 18) that were not presynchronized or did not initiate a NFW were excluded from further analyses, resulting in 142 and 152 heifers in MT and OH, respectively. Heifers from the MF treatment in MT that initiated a second NFW after EB but before PGF2α (MF2; n = 14) were excluded from the primary The objective of this study was to determine The objective of this study was to determine the effect of age of the ovulatory follicle on fertility in beef heifers. Ovulation was synchronized with the 5 d CO-Synch + controlled intravaginal drug release (CIDR) program in heifers in Montana (MT; n = 162, Hereford and Angus Crossbred) and Ohio (OH; n = 170, Angus Crossbred). All heifers received estradiol benzoate (EB; 1 mg/500 kg BW, [i.m.]) 6 d after the final GnRH of the synchronization program to induce follicular atresia and emergence of a new follicular wave (NFW) followed by prostaglandin F2... (PGF2...; 25 mg, i.m.) administration either 5 d ("young" follicle [YF]; n = 158) or 9 d ("mature" follicle [MF]; n = 174) after EB. Estrous detection was performed for 5 d after PGF2α with AI approximately 12 h after onset of estrus. Ovarian ultrasonography (MT location only) was performed in YF and MF at EB, 5 d after EB, PGF2α, and AI. Heifers in MT (n = 20) and OH (n = 18) that were not presynchronized or did not initiate a NFW were excluded from further analyses, resulting in 142 and 152 heifers in MT and OH, respectively. Heifers from the MF treatment in MT that initiated a second NFW after EB but before PGF2α (MF2; n = 14) were excluded from the priwas compared to MF and YF treatments in MT. Estrous response was similar (90%; 252/280) between treatments and locations. Proestrus interval (from PGF2α to estrus) and age of the ovulatory follicle at AI were similar for MF heifers between locations (54.6 ± 1.7 h and 8.3 ± 0.07 h) but were greater (P < 0.01) for YF heifers in OH (78.5 ± 1.4 h and 5.3 ± 0.06 h) than MT (67.4 ± 1.6 h and 4.8 ± 0.06 h; treatment ... location, P < 0.01). However, conception rate did not differ for MF (63.8%; 74/116) and YF (67.0%; 91/136) treatments. In the MT heifers, follicle size and follicle age at AI in the YF treatment (10.4 ± 0.15 mm and 4.8 ± 0.06 d, respectively) was less (P < 0.01) than in the MF treatment (11.0 ± 0.18 mm and 8.3 ± 0.11 d, respectively), but conception rate to AI did not differ between treatments in MT. In the MF2 group proestrus interval was greater (P < 0.01); hence, diameter of the ovulatory follicle and age were similar to that for the YF treatment. Conception rate to AI did not differ between MF2, MF, and YF (61.5, 63.3, and 64.7%, respectively) in MT. In conclusion, manipulation of age of the nonpersistent ovulatory follicle at spontaneous ovulation did not influence conception rate. (ProQuest: ... denotes formulae/symbols omitted.)</description><identifier>ISSN: 0021-8812</identifier><identifier>EISSN: 1525-3163</identifier><identifier>DOI: 10.2527/jas.2013-6761</identifier><language>eng</language><publisher>Champaign: Oxford University Press</publisher><subject>Animal reproduction ; Cattle ; Fertility ; Reproductive system</subject><ispartof>Journal of animal science, 2014-03, Vol.92 (3), p.1022-1028</ispartof><rights>Copyright American Society of Animal Science Mar 2014</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c1760-8eefa7d10f86d054e550a1d2e3a25fa2922bd29121f3043724d0f876821c46ac3</citedby><cites>FETCH-LOGICAL-c1760-8eefa7d10f86d054e550a1d2e3a25fa2922bd29121f3043724d0f876821c46ac3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Abreu, F. M.</creatorcontrib><creatorcontrib>Cruppe, L. H.</creatorcontrib><creatorcontrib>Maquivar, M.</creatorcontrib><creatorcontrib>Utt, M. D.</creatorcontrib><creatorcontrib>Madsen, C. A.</creatorcontrib><creatorcontrib>Vasconcelos, J. L. M.</creatorcontrib><creatorcontrib>Mussard, M. L.</creatorcontrib><creatorcontrib>Day, M. L.</creatorcontrib><creatorcontrib>Geary, T. W.</creatorcontrib><title>Effect of follicle age on conception rate in beef heifers1</title><title>Journal of animal science</title><description>The objective of this study was to determine the effect of age of the ovulatory follicle on fertility in beef heifers. Ovulation was synchronized with the 5 d CO-Synch + controlled intravaginal drug release (CIDR) program in heifers in Montana (MT; n = 162, Hereford and Angus Crossbred) and Ohio (OH; n = 170, Angus Crossbred). All heifers received estradiol benzoate (EB; 1 mg/500 kg BW, [i.m.]) 6 d after the final GnRH of the synchronization program to induce follicular atresia and emergence of a new follicular wave (NFW) followed by prostaglandin F2... (PGF2...; 25 mg, i.m.) administration either 5 d ("young" follicle [YF]; n = 158) or 9 d ("mature" follicle [MF]; n = 174) after EB. Estrous detection was performed for 5 d after PGF2α with AI approximately 12 h after onset of estrus. Ovarian ultrasonography (MT location only) was performed in YF and MF at EB, 5 d after EB, PGF2α, and AI. Heifers in MT (n = 20) and OH (n = 18) that were not presynchronized or did not initiate a NFW were excluded from further analyses, resulting in 142 and 152 heifers in MT and OH, respectively. Heifers from the MF treatment in MT that initiated a second NFW after EB but before PGF2α (MF2; n = 14) were excluded from the primary The objective of this study was to determine The objective of this study was to determine the effect of age of the ovulatory follicle on fertility in beef heifers. Ovulation was synchronized with the 5 d CO-Synch + controlled intravaginal drug release (CIDR) program in heifers in Montana (MT; n = 162, Hereford and Angus Crossbred) and Ohio (OH; n = 170, Angus Crossbred). All heifers received estradiol benzoate (EB; 1 mg/500 kg BW, [i.m.]) 6 d after the final GnRH of the synchronization program to induce follicular atresia and emergence of a new follicular wave (NFW) followed by prostaglandin F2... (PGF2...; 25 mg, i.m.) administration either 5 d ("young" follicle [YF]; n = 158) or 9 d ("mature" follicle [MF]; n = 174) after EB. Estrous detection was performed for 5 d after PGF2α with AI approximately 12 h after onset of estrus. Ovarian ultrasonography (MT location only) was performed in YF and MF at EB, 5 d after EB, PGF2α, and AI. Heifers in MT (n = 20) and OH (n = 18) that were not presynchronized or did not initiate a NFW were excluded from further analyses, resulting in 142 and 152 heifers in MT and OH, respectively. Heifers from the MF treatment in MT that initiated a second NFW after EB but before PGF2α (MF2; n = 14) were excluded from the priwas compared to MF and YF treatments in MT. Estrous response was similar (90%; 252/280) between treatments and locations. Proestrus interval (from PGF2α to estrus) and age of the ovulatory follicle at AI were similar for MF heifers between locations (54.6 ± 1.7 h and 8.3 ± 0.07 h) but were greater (P < 0.01) for YF heifers in OH (78.5 ± 1.4 h and 5.3 ± 0.06 h) than MT (67.4 ± 1.6 h and 4.8 ± 0.06 h; treatment ... location, P < 0.01). However, conception rate did not differ for MF (63.8%; 74/116) and YF (67.0%; 91/136) treatments. In the MT heifers, follicle size and follicle age at AI in the YF treatment (10.4 ± 0.15 mm and 4.8 ± 0.06 d, respectively) was less (P < 0.01) than in the MF treatment (11.0 ± 0.18 mm and 8.3 ± 0.11 d, respectively), but conception rate to AI did not differ between treatments in MT. In the MF2 group proestrus interval was greater (P < 0.01); hence, diameter of the ovulatory follicle and age were similar to that for the YF treatment. Conception rate to AI did not differ between MF2, MF, and YF (61.5, 63.3, and 64.7%, respectively) in MT. In conclusion, manipulation of age of the nonpersistent ovulatory follicle at spontaneous ovulation did not influence conception rate. 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M. ; Cruppe, L. H. ; Maquivar, M. ; Utt, M. D. ; Madsen, C. A. ; Vasconcelos, J. L. M. ; Mussard, M. L. ; Day, M. L. ; Geary, T. W.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c1760-8eefa7d10f86d054e550a1d2e3a25fa2922bd29121f3043724d0f876821c46ac3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Animal reproduction</topic><topic>Cattle</topic><topic>Fertility</topic><topic>Reproductive system</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Abreu, F. M.</creatorcontrib><creatorcontrib>Cruppe, L. H.</creatorcontrib><creatorcontrib>Maquivar, M.</creatorcontrib><creatorcontrib>Utt, M. D.</creatorcontrib><creatorcontrib>Madsen, C. A.</creatorcontrib><creatorcontrib>Vasconcelos, J. L. M.</creatorcontrib><creatorcontrib>Mussard, M. L.</creatorcontrib><creatorcontrib>Day, M. L.</creatorcontrib><creatorcontrib>Geary, T. 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M.</au><au>Cruppe, L. H.</au><au>Maquivar, M.</au><au>Utt, M. D.</au><au>Madsen, C. A.</au><au>Vasconcelos, J. L. M.</au><au>Mussard, M. L.</au><au>Day, M. L.</au><au>Geary, T. W.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of follicle age on conception rate in beef heifers1</atitle><jtitle>Journal of animal science</jtitle><date>2014-03-01</date><risdate>2014</risdate><volume>92</volume><issue>3</issue><spage>1022</spage><epage>1028</epage><pages>1022-1028</pages><issn>0021-8812</issn><eissn>1525-3163</eissn><abstract>The objective of this study was to determine the effect of age of the ovulatory follicle on fertility in beef heifers. Ovulation was synchronized with the 5 d CO-Synch + controlled intravaginal drug release (CIDR) program in heifers in Montana (MT; n = 162, Hereford and Angus Crossbred) and Ohio (OH; n = 170, Angus Crossbred). All heifers received estradiol benzoate (EB; 1 mg/500 kg BW, [i.m.]) 6 d after the final GnRH of the synchronization program to induce follicular atresia and emergence of a new follicular wave (NFW) followed by prostaglandin F2... (PGF2...; 25 mg, i.m.) administration either 5 d ("young" follicle [YF]; n = 158) or 9 d ("mature" follicle [MF]; n = 174) after EB. Estrous detection was performed for 5 d after PGF2α with AI approximately 12 h after onset of estrus. Ovarian ultrasonography (MT location only) was performed in YF and MF at EB, 5 d after EB, PGF2α, and AI. Heifers in MT (n = 20) and OH (n = 18) that were not presynchronized or did not initiate a NFW were excluded from further analyses, resulting in 142 and 152 heifers in MT and OH, respectively. Heifers from the MF treatment in MT that initiated a second NFW after EB but before PGF2α (MF2; n = 14) were excluded from the primary The objective of this study was to determine The objective of this study was to determine the effect of age of the ovulatory follicle on fertility in beef heifers. Ovulation was synchronized with the 5 d CO-Synch + controlled intravaginal drug release (CIDR) program in heifers in Montana (MT; n = 162, Hereford and Angus Crossbred) and Ohio (OH; n = 170, Angus Crossbred). All heifers received estradiol benzoate (EB; 1 mg/500 kg BW, [i.m.]) 6 d after the final GnRH of the synchronization program to induce follicular atresia and emergence of a new follicular wave (NFW) followed by prostaglandin F2... (PGF2...; 25 mg, i.m.) administration either 5 d ("young" follicle [YF]; n = 158) or 9 d ("mature" follicle [MF]; n = 174) after EB. Estrous detection was performed for 5 d after PGF2α with AI approximately 12 h after onset of estrus. Ovarian ultrasonography (MT location only) was performed in YF and MF at EB, 5 d after EB, PGF2α, and AI. Heifers in MT (n = 20) and OH (n = 18) that were not presynchronized or did not initiate a NFW were excluded from further analyses, resulting in 142 and 152 heifers in MT and OH, respectively. Heifers from the MF treatment in MT that initiated a second NFW after EB but before PGF2α (MF2; n = 14) were excluded from the priwas compared to MF and YF treatments in MT. Estrous response was similar (90%; 252/280) between treatments and locations. Proestrus interval (from PGF2α to estrus) and age of the ovulatory follicle at AI were similar for MF heifers between locations (54.6 ± 1.7 h and 8.3 ± 0.07 h) but were greater (P < 0.01) for YF heifers in OH (78.5 ± 1.4 h and 5.3 ± 0.06 h) than MT (67.4 ± 1.6 h and 4.8 ± 0.06 h; treatment ... location, P < 0.01). However, conception rate did not differ for MF (63.8%; 74/116) and YF (67.0%; 91/136) treatments. In the MT heifers, follicle size and follicle age at AI in the YF treatment (10.4 ± 0.15 mm and 4.8 ± 0.06 d, respectively) was less (P < 0.01) than in the MF treatment (11.0 ± 0.18 mm and 8.3 ± 0.11 d, respectively), but conception rate to AI did not differ between treatments in MT. In the MF2 group proestrus interval was greater (P < 0.01); hence, diameter of the ovulatory follicle and age were similar to that for the YF treatment. Conception rate to AI did not differ between MF2, MF, and YF (61.5, 63.3, and 64.7%, respectively) in MT. In conclusion, manipulation of age of the nonpersistent ovulatory follicle at spontaneous ovulation did not influence conception rate. (ProQuest: ... denotes formulae/symbols omitted.)</abstract><cop>Champaign</cop><pub>Oxford University Press</pub><doi>10.2527/jas.2013-6761</doi><tpages>7</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0021-8812 |
| ispartof | Journal of animal science, 2014-03, Vol.92 (3), p.1022-1028 |
| issn | 0021-8812 1525-3163 |
| language | eng |
| recordid | cdi_proquest_journals_1511119760 |
| source | Oxford University Press Journals All Titles (1996-Current) |
| subjects | Animal reproduction Cattle Fertility Reproductive system |
| title | Effect of follicle age on conception rate in beef heifers1 |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-18T23%3A19%3A49IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Effect%20of%20follicle%20age%20on%20conception%20rate%20in%20beef%20heifers1&rft.jtitle=Journal%20of%20animal%20science&rft.au=Abreu,%20F.%20M.&rft.date=2014-03-01&rft.volume=92&rft.issue=3&rft.spage=1022&rft.epage=1028&rft.pages=1022-1028&rft.issn=0021-8812&rft.eissn=1525-3163&rft_id=info:doi/10.2527/jas.2013-6761&rft_dat=%3Cproquest_cross%3E3259743361%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=1511119760&rft_id=info:pmid/&rfr_iscdi=true |