Comparison between 7 vs 9 days of controlled internal drug release inserts permanency on oestrus performance and fertility in lactating dairy cattle

The objective was to evaluate the reproductive performance after oestrus synchronization using controlled internal drug release (CIDR) maintained into the vagina either 7 or 9 days. A controlled randomized block design was performed. Cows (n=255) were blocked by lactation number and days in milk an...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Juan E. Romano [verfasserIn] Melvyn L. Fahning [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2013

Schlagwörter:	Cattle, Controlled internal drug release, Estrus synchronization, Estrus performance, Fertility

Übergeordnetes Werk:	In: Italian Journal of Animal Science - Taylor & Francis Group, 2007, 12(2013), 3, Seite e63-e63
Übergeordnetes Werk:	volume:12 ; year:2013 ; number:3 ; pages:e63-e63

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc Journal toc

DOI / URN:	10.4081/ijas.2013.e63

Katalog-ID:	DOAJ00733656X

Internformat


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520			\|a The objective was to evaluate the reproductive performance after oestrus synchronization using controlled internal drug release (CIDR) maintained into the vagina either 7 or 9 days. A controlled randomized block design was performed. Cows (n=255) were blocked by lactation number and days in milk and then randomly divided into 2 groups. In the first group, CIDR was maintained for 7 days (CIDR-7; n=127), and in the second group, CIDR was maintained for 9 days (CIDR-9; n=128). Both groups received Prostaglandin-F2α at CIDR removal. Oestrus response, oestrus onset, oestrus duration, conception rate, and pregnancy at days 28 and 45 were evaluated. Cows were oestrus detected 4 times a day for 120 hours after CIDR removal, and only cows in standing oestrus were artificially inseminated between 6 and 12 hours after oestrus detection. Oestrus response for both groups was 79.5% and 87.5% for CIDR-7 and CIDR-9, respectively (P=0.09). The oestrus onset (mean ± SD) for the same groups was 56.3±17.2 h and 59.4±17.9 h, respectively (P=0.19). Oestrus duration was 11.3±7.3 h and 11.7±7.8 h for groups CIDR-7 and CIDR-9, respectively (P=0.71). At day 28, the conception rates for the groups CIDR-7 and CIDR-9 days were 51.5% and 45.5% (P=0.39), and the pregnancy rates were 40.9% and 39.8% (P=0.89) for the same groups, respectively. No differences in oestrus performance and fertility in lactating cows’ oestrus synchronized by using CIDR maintained in the vagina either 7 or 9 days were detected.
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allfields	10.4081/ijas.2013.e63 doi (DE-627)DOAJ00733656X (DE-599)DOAJe465c36ca8de427fb6031d73ed549585 DE-627 ger DE-627 rakwb eng SF1-1100 Juan E. Romano verfasserin aut Comparison between 7 vs 9 days of controlled internal drug release inserts permanency on oestrus performance and fertility in lactating dairy cattle 2013 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The objective was to evaluate the reproductive performance after oestrus synchronization using controlled internal drug release (CIDR) maintained into the vagina either 7 or 9 days. A controlled randomized block design was performed. Cows (n=255) were blocked by lactation number and days in milk and then randomly divided into 2 groups. In the first group, CIDR was maintained for 7 days (CIDR-7; n=127), and in the second group, CIDR was maintained for 9 days (CIDR-9; n=128). Both groups received Prostaglandin-F2α at CIDR removal. Oestrus response, oestrus onset, oestrus duration, conception rate, and pregnancy at days 28 and 45 were evaluated. Cows were oestrus detected 4 times a day for 120 hours after CIDR removal, and only cows in standing oestrus were artificially inseminated between 6 and 12 hours after oestrus detection. Oestrus response for both groups was 79.5% and 87.5% for CIDR-7 and CIDR-9, respectively (P=0.09). The oestrus onset (mean ± SD) for the same groups was 56.3±17.2 h and 59.4±17.9 h, respectively (P=0.19). Oestrus duration was 11.3±7.3 h and 11.7±7.8 h for groups CIDR-7 and CIDR-9, respectively (P=0.71). At day 28, the conception rates for the groups CIDR-7 and CIDR-9 days were 51.5% and 45.5% (P=0.39), and the pregnancy rates were 40.9% and 39.8% (P=0.89) for the same groups, respectively. No differences in oestrus performance and fertility in lactating cows’ oestrus synchronized by using CIDR maintained in the vagina either 7 or 9 days were detected. Cattle, Controlled internal drug release, Estrus synchronization, Estrus performance, Fertility Animal culture Melvyn L. Fahning verfasserin aut In Italian Journal of Animal Science Taylor & Francis Group, 2007 12(2013), 3, Seite e63-e63 (DE-627)558387608 (DE-600)2408994-1 1828051X nnns volume:12 year:2013 number:3 pages:e63-e63 https://doi.org/10.4081/ijas.2013.e63 kostenfrei https://doaj.org/article/e465c36ca8de427fb6031d73ed549585 kostenfrei http://www.aspajournal.it/index.php/ijas/article/view/2836 kostenfrei https://doaj.org/toc/1594-4077 Journal toc kostenfrei https://doaj.org/toc/1828-051X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 12 2013 3 e63-e63
spelling	10.4081/ijas.2013.e63 doi (DE-627)DOAJ00733656X (DE-599)DOAJe465c36ca8de427fb6031d73ed549585 DE-627 ger DE-627 rakwb eng SF1-1100 Juan E. Romano verfasserin aut Comparison between 7 vs 9 days of controlled internal drug release inserts permanency on oestrus performance and fertility in lactating dairy cattle 2013 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The objective was to evaluate the reproductive performance after oestrus synchronization using controlled internal drug release (CIDR) maintained into the vagina either 7 or 9 days. A controlled randomized block design was performed. Cows (n=255) were blocked by lactation number and days in milk and then randomly divided into 2 groups. In the first group, CIDR was maintained for 7 days (CIDR-7; n=127), and in the second group, CIDR was maintained for 9 days (CIDR-9; n=128). Both groups received Prostaglandin-F2α at CIDR removal. Oestrus response, oestrus onset, oestrus duration, conception rate, and pregnancy at days 28 and 45 were evaluated. Cows were oestrus detected 4 times a day for 120 hours after CIDR removal, and only cows in standing oestrus were artificially inseminated between 6 and 12 hours after oestrus detection. Oestrus response for both groups was 79.5% and 87.5% for CIDR-7 and CIDR-9, respectively (P=0.09). The oestrus onset (mean ± SD) for the same groups was 56.3±17.2 h and 59.4±17.9 h, respectively (P=0.19). Oestrus duration was 11.3±7.3 h and 11.7±7.8 h for groups CIDR-7 and CIDR-9, respectively (P=0.71). At day 28, the conception rates for the groups CIDR-7 and CIDR-9 days were 51.5% and 45.5% (P=0.39), and the pregnancy rates were 40.9% and 39.8% (P=0.89) for the same groups, respectively. No differences in oestrus performance and fertility in lactating cows’ oestrus synchronized by using CIDR maintained in the vagina either 7 or 9 days were detected. Cattle, Controlled internal drug release, Estrus synchronization, Estrus performance, Fertility Animal culture Melvyn L. Fahning verfasserin aut In Italian Journal of Animal Science Taylor & Francis Group, 2007 12(2013), 3, Seite e63-e63 (DE-627)558387608 (DE-600)2408994-1 1828051X nnns volume:12 year:2013 number:3 pages:e63-e63 https://doi.org/10.4081/ijas.2013.e63 kostenfrei https://doaj.org/article/e465c36ca8de427fb6031d73ed549585 kostenfrei http://www.aspajournal.it/index.php/ijas/article/view/2836 kostenfrei https://doaj.org/toc/1594-4077 Journal toc kostenfrei https://doaj.org/toc/1828-051X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 12 2013 3 e63-e63
allfields_unstemmed	10.4081/ijas.2013.e63 doi (DE-627)DOAJ00733656X (DE-599)DOAJe465c36ca8de427fb6031d73ed549585 DE-627 ger DE-627 rakwb eng SF1-1100 Juan E. Romano verfasserin aut Comparison between 7 vs 9 days of controlled internal drug release inserts permanency on oestrus performance and fertility in lactating dairy cattle 2013 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The objective was to evaluate the reproductive performance after oestrus synchronization using controlled internal drug release (CIDR) maintained into the vagina either 7 or 9 days. A controlled randomized block design was performed. Cows (n=255) were blocked by lactation number and days in milk and then randomly divided into 2 groups. In the first group, CIDR was maintained for 7 days (CIDR-7; n=127), and in the second group, CIDR was maintained for 9 days (CIDR-9; n=128). Both groups received Prostaglandin-F2α at CIDR removal. Oestrus response, oestrus onset, oestrus duration, conception rate, and pregnancy at days 28 and 45 were evaluated. Cows were oestrus detected 4 times a day for 120 hours after CIDR removal, and only cows in standing oestrus were artificially inseminated between 6 and 12 hours after oestrus detection. Oestrus response for both groups was 79.5% and 87.5% for CIDR-7 and CIDR-9, respectively (P=0.09). The oestrus onset (mean ± SD) for the same groups was 56.3±17.2 h and 59.4±17.9 h, respectively (P=0.19). Oestrus duration was 11.3±7.3 h and 11.7±7.8 h for groups CIDR-7 and CIDR-9, respectively (P=0.71). At day 28, the conception rates for the groups CIDR-7 and CIDR-9 days were 51.5% and 45.5% (P=0.39), and the pregnancy rates were 40.9% and 39.8% (P=0.89) for the same groups, respectively. No differences in oestrus performance and fertility in lactating cows’ oestrus synchronized by using CIDR maintained in the vagina either 7 or 9 days were detected. Cattle, Controlled internal drug release, Estrus synchronization, Estrus performance, Fertility Animal culture Melvyn L. Fahning verfasserin aut In Italian Journal of Animal Science Taylor & Francis Group, 2007 12(2013), 3, Seite e63-e63 (DE-627)558387608 (DE-600)2408994-1 1828051X nnns volume:12 year:2013 number:3 pages:e63-e63 https://doi.org/10.4081/ijas.2013.e63 kostenfrei https://doaj.org/article/e465c36ca8de427fb6031d73ed549585 kostenfrei http://www.aspajournal.it/index.php/ijas/article/view/2836 kostenfrei https://doaj.org/toc/1594-4077 Journal toc kostenfrei https://doaj.org/toc/1828-051X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 12 2013 3 e63-e63
allfieldsGer	10.4081/ijas.2013.e63 doi (DE-627)DOAJ00733656X (DE-599)DOAJe465c36ca8de427fb6031d73ed549585 DE-627 ger DE-627 rakwb eng SF1-1100 Juan E. Romano verfasserin aut Comparison between 7 vs 9 days of controlled internal drug release inserts permanency on oestrus performance and fertility in lactating dairy cattle 2013 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The objective was to evaluate the reproductive performance after oestrus synchronization using controlled internal drug release (CIDR) maintained into the vagina either 7 or 9 days. A controlled randomized block design was performed. Cows (n=255) were blocked by lactation number and days in milk and then randomly divided into 2 groups. In the first group, CIDR was maintained for 7 days (CIDR-7; n=127), and in the second group, CIDR was maintained for 9 days (CIDR-9; n=128). Both groups received Prostaglandin-F2α at CIDR removal. Oestrus response, oestrus onset, oestrus duration, conception rate, and pregnancy at days 28 and 45 were evaluated. Cows were oestrus detected 4 times a day for 120 hours after CIDR removal, and only cows in standing oestrus were artificially inseminated between 6 and 12 hours after oestrus detection. Oestrus response for both groups was 79.5% and 87.5% for CIDR-7 and CIDR-9, respectively (P=0.09). The oestrus onset (mean ± SD) for the same groups was 56.3±17.2 h and 59.4±17.9 h, respectively (P=0.19). Oestrus duration was 11.3±7.3 h and 11.7±7.8 h for groups CIDR-7 and CIDR-9, respectively (P=0.71). At day 28, the conception rates for the groups CIDR-7 and CIDR-9 days were 51.5% and 45.5% (P=0.39), and the pregnancy rates were 40.9% and 39.8% (P=0.89) for the same groups, respectively. No differences in oestrus performance and fertility in lactating cows’ oestrus synchronized by using CIDR maintained in the vagina either 7 or 9 days were detected. Cattle, Controlled internal drug release, Estrus synchronization, Estrus performance, Fertility Animal culture Melvyn L. Fahning verfasserin aut In Italian Journal of Animal Science Taylor & Francis Group, 2007 12(2013), 3, Seite e63-e63 (DE-627)558387608 (DE-600)2408994-1 1828051X nnns volume:12 year:2013 number:3 pages:e63-e63 https://doi.org/10.4081/ijas.2013.e63 kostenfrei https://doaj.org/article/e465c36ca8de427fb6031d73ed549585 kostenfrei http://www.aspajournal.it/index.php/ijas/article/view/2836 kostenfrei https://doaj.org/toc/1594-4077 Journal toc kostenfrei https://doaj.org/toc/1828-051X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 12 2013 3 e63-e63
allfieldsSound	10.4081/ijas.2013.e63 doi (DE-627)DOAJ00733656X (DE-599)DOAJe465c36ca8de427fb6031d73ed549585 DE-627 ger DE-627 rakwb eng SF1-1100 Juan E. Romano verfasserin aut Comparison between 7 vs 9 days of controlled internal drug release inserts permanency on oestrus performance and fertility in lactating dairy cattle 2013 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The objective was to evaluate the reproductive performance after oestrus synchronization using controlled internal drug release (CIDR) maintained into the vagina either 7 or 9 days. A controlled randomized block design was performed. Cows (n=255) were blocked by lactation number and days in milk and then randomly divided into 2 groups. In the first group, CIDR was maintained for 7 days (CIDR-7; n=127), and in the second group, CIDR was maintained for 9 days (CIDR-9; n=128). Both groups received Prostaglandin-F2α at CIDR removal. Oestrus response, oestrus onset, oestrus duration, conception rate, and pregnancy at days 28 and 45 were evaluated. Cows were oestrus detected 4 times a day for 120 hours after CIDR removal, and only cows in standing oestrus were artificially inseminated between 6 and 12 hours after oestrus detection. Oestrus response for both groups was 79.5% and 87.5% for CIDR-7 and CIDR-9, respectively (P=0.09). The oestrus onset (mean ± SD) for the same groups was 56.3±17.2 h and 59.4±17.9 h, respectively (P=0.19). Oestrus duration was 11.3±7.3 h and 11.7±7.8 h for groups CIDR-7 and CIDR-9, respectively (P=0.71). At day 28, the conception rates for the groups CIDR-7 and CIDR-9 days were 51.5% and 45.5% (P=0.39), and the pregnancy rates were 40.9% and 39.8% (P=0.89) for the same groups, respectively. No differences in oestrus performance and fertility in lactating cows’ oestrus synchronized by using CIDR maintained in the vagina either 7 or 9 days were detected. Cattle, Controlled internal drug release, Estrus synchronization, Estrus performance, Fertility Animal culture Melvyn L. Fahning verfasserin aut In Italian Journal of Animal Science Taylor & Francis Group, 2007 12(2013), 3, Seite e63-e63 (DE-627)558387608 (DE-600)2408994-1 1828051X nnns volume:12 year:2013 number:3 pages:e63-e63 https://doi.org/10.4081/ijas.2013.e63 kostenfrei https://doaj.org/article/e465c36ca8de427fb6031d73ed549585 kostenfrei http://www.aspajournal.it/index.php/ijas/article/view/2836 kostenfrei https://doaj.org/toc/1594-4077 Journal toc kostenfrei https://doaj.org/toc/1828-051X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 12 2013 3 e63-e63
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callnumber-first	S - Agriculture
author	Juan E. Romano
spellingShingle	Juan E. Romano misc SF1-1100 misc Cattle, Controlled internal drug release, Estrus synchronization, Estrus performance, Fertility misc Animal culture Comparison between 7 vs 9 days of controlled internal drug release inserts permanency on oestrus performance and fertility in lactating dairy cattle
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topic_title	SF1-1100 Comparison between 7 vs 9 days of controlled internal drug release inserts permanency on oestrus performance and fertility in lactating dairy cattle Cattle, Controlled internal drug release, Estrus synchronization, Estrus performance, Fertility
topic	misc SF1-1100 misc Cattle, Controlled internal drug release, Estrus synchronization, Estrus performance, Fertility misc Animal culture
topic_unstemmed	misc SF1-1100 misc Cattle, Controlled internal drug release, Estrus synchronization, Estrus performance, Fertility misc Animal culture
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title	Comparison between 7 vs 9 days of controlled internal drug release inserts permanency on oestrus performance and fertility in lactating dairy cattle
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title_full	Comparison between 7 vs 9 days of controlled internal drug release inserts permanency on oestrus performance and fertility in lactating dairy cattle
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title_sort	comparison between 7 vs 9 days of controlled internal drug release inserts permanency on oestrus performance and fertility in lactating dairy cattle
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title_auth	Comparison between 7 vs 9 days of controlled internal drug release inserts permanency on oestrus performance and fertility in lactating dairy cattle
abstract	The objective was to evaluate the reproductive performance after oestrus synchronization using controlled internal drug release (CIDR) maintained into the vagina either 7 or 9 days. A controlled randomized block design was performed. Cows (n=255) were blocked by lactation number and days in milk and then randomly divided into 2 groups. In the first group, CIDR was maintained for 7 days (CIDR-7; n=127), and in the second group, CIDR was maintained for 9 days (CIDR-9; n=128). Both groups received Prostaglandin-F2α at CIDR removal. Oestrus response, oestrus onset, oestrus duration, conception rate, and pregnancy at days 28 and 45 were evaluated. Cows were oestrus detected 4 times a day for 120 hours after CIDR removal, and only cows in standing oestrus were artificially inseminated between 6 and 12 hours after oestrus detection. Oestrus response for both groups was 79.5% and 87.5% for CIDR-7 and CIDR-9, respectively (P=0.09). The oestrus onset (mean ± SD) for the same groups was 56.3±17.2 h and 59.4±17.9 h, respectively (P=0.19). Oestrus duration was 11.3±7.3 h and 11.7±7.8 h for groups CIDR-7 and CIDR-9, respectively (P=0.71). At day 28, the conception rates for the groups CIDR-7 and CIDR-9 days were 51.5% and 45.5% (P=0.39), and the pregnancy rates were 40.9% and 39.8% (P=0.89) for the same groups, respectively. No differences in oestrus performance and fertility in lactating cows’ oestrus synchronized by using CIDR maintained in the vagina either 7 or 9 days were detected.
abstractGer	The objective was to evaluate the reproductive performance after oestrus synchronization using controlled internal drug release (CIDR) maintained into the vagina either 7 or 9 days. A controlled randomized block design was performed. Cows (n=255) were blocked by lactation number and days in milk and then randomly divided into 2 groups. In the first group, CIDR was maintained for 7 days (CIDR-7; n=127), and in the second group, CIDR was maintained for 9 days (CIDR-9; n=128). Both groups received Prostaglandin-F2α at CIDR removal. Oestrus response, oestrus onset, oestrus duration, conception rate, and pregnancy at days 28 and 45 were evaluated. Cows were oestrus detected 4 times a day for 120 hours after CIDR removal, and only cows in standing oestrus were artificially inseminated between 6 and 12 hours after oestrus detection. Oestrus response for both groups was 79.5% and 87.5% for CIDR-7 and CIDR-9, respectively (P=0.09). The oestrus onset (mean ± SD) for the same groups was 56.3±17.2 h and 59.4±17.9 h, respectively (P=0.19). Oestrus duration was 11.3±7.3 h and 11.7±7.8 h for groups CIDR-7 and CIDR-9, respectively (P=0.71). At day 28, the conception rates for the groups CIDR-7 and CIDR-9 days were 51.5% and 45.5% (P=0.39), and the pregnancy rates were 40.9% and 39.8% (P=0.89) for the same groups, respectively. No differences in oestrus performance and fertility in lactating cows’ oestrus synchronized by using CIDR maintained in the vagina either 7 or 9 days were detected.
abstract_unstemmed	The objective was to evaluate the reproductive performance after oestrus synchronization using controlled internal drug release (CIDR) maintained into the vagina either 7 or 9 days. A controlled randomized block design was performed. Cows (n=255) were blocked by lactation number and days in milk and then randomly divided into 2 groups. In the first group, CIDR was maintained for 7 days (CIDR-7; n=127), and in the second group, CIDR was maintained for 9 days (CIDR-9; n=128). Both groups received Prostaglandin-F2α at CIDR removal. Oestrus response, oestrus onset, oestrus duration, conception rate, and pregnancy at days 28 and 45 were evaluated. Cows were oestrus detected 4 times a day for 120 hours after CIDR removal, and only cows in standing oestrus were artificially inseminated between 6 and 12 hours after oestrus detection. Oestrus response for both groups was 79.5% and 87.5% for CIDR-7 and CIDR-9, respectively (P=0.09). The oestrus onset (mean ± SD) for the same groups was 56.3±17.2 h and 59.4±17.9 h, respectively (P=0.19). Oestrus duration was 11.3±7.3 h and 11.7±7.8 h for groups CIDR-7 and CIDR-9, respectively (P=0.71). At day 28, the conception rates for the groups CIDR-7 and CIDR-9 days were 51.5% and 45.5% (P=0.39), and the pregnancy rates were 40.9% and 39.8% (P=0.89) for the same groups, respectively. No differences in oestrus performance and fertility in lactating cows’ oestrus synchronized by using CIDR maintained in the vagina either 7 or 9 days were detected.
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title_short	Comparison between 7 vs 9 days of controlled internal drug release inserts permanency on oestrus performance and fertility in lactating dairy cattle
url	https://doi.org/10.4081/ijas.2013.e63 https://doaj.org/article/e465c36ca8de427fb6031d73ed549585 http://www.aspajournal.it/index.php/ijas/article/view/2836 https://doaj.org/toc/1594-4077 https://doaj.org/toc/1828-051X
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A controlled randomized block design was performed. Cows (n=255) were blocked by lactation number and days in milk and then randomly divided into 2 groups. In the first group, CIDR was maintained for 7 days (CIDR-7; n=127), and in the second group, CIDR was maintained for 9 days (CIDR-9; n=128). Both groups received Prostaglandin-F2α at CIDR removal. Oestrus response, oestrus onset, oestrus duration, conception rate, and pregnancy at days 28 and 45 were evaluated. Cows were oestrus detected 4 times a day for 120 hours after CIDR removal, and only cows in standing oestrus were artificially inseminated between 6 and 12 hours after oestrus detection. Oestrus response for both groups was 79.5% and 87.5% for CIDR-7 and CIDR-9, respectively (P=0.09). The oestrus onset (mean ± SD) for the same groups was 56.3±17.2 h and 59.4±17.9 h, respectively (P=0.19). Oestrus duration was 11.3±7.3 h and 11.7±7.8 h for groups CIDR-7 and CIDR-9, respectively (P=0.71). At day 28, the conception rates for the groups CIDR-7 and CIDR-9 days were 51.5% and 45.5% (P=0.39), and the pregnancy rates were 40.9% and 39.8% (P=0.89) for the same groups, respectively. No differences in oestrus performance and fertility in lactating cows’ oestrus synchronized by using CIDR maintained in the vagina either 7 or 9 days were detected.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Cattle, Controlled internal drug release, Estrus synchronization, Estrus performance, Fertility</subfield></datafield><datafield tag="653" ind1=" " ind2="0"><subfield code="a">Animal culture</subfield></datafield><datafield tag="700" ind1="0" ind2=" "><subfield code="a">Melvyn L. 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Comparison between 7 vs 9 days of controlled internal drug release inserts permanency on oestrus performance and fertility in lactating dairy cattle

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