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 | Acceso al texto completo restringido a Biblioteca INIA Las Brujas. Por información adicional contacte bibliolb@inia.org.uy. |
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Registro completo
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Biblioteca (s) : |
INIA Las Brujas. |
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Fecha : |
21/02/2014 |
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Actualizado : |
04/10/2019 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Autor : |
CAVESTANY, D.; CIBILS, J.; FREIRE, A.; SASTRE, A.; STEVENSON, J.S. |
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Afiliación : |
DANIEL CAVESTANY BOCKING, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; J. CIBILS, Private Veterinarians, Young, Rio Negro, Uruguay; A. FREIRE, Private Veterinarians, Young, Rio Negro, Uruguay; A. SASTRE, Private Veterinarians, Young, Rio Negro, Uruguay; J. S. STEVENSON, Department of Animal Sciences and Industry, Kansas State University, USA. |
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Título : |
Evaluation of two different oestrus-synchronisation methods with timed artificial insemination and resynchronisation of returns to oestrus in lactating Holstein cows. |
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Fecha de publicación : |
2003 |
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Fuente / Imprenta : |
Animal Reproduction Science, 15 July 2003, 77 (3-4): 141-155. |
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ISSN : |
0378-4320 |
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DOI : |
10.1016/S0378-4320(03)00032-0 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 18 July 2002 / Received in revised form 23 December 2002 / Accepted 6 January 2003 / Available online 6 March 2003. |
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Contenido : |
ABSTRACT.
To examine the outcomes of adding medroxyprogesterone acetate (MAP) to the ovsynch protocol with the traditional ovsynch protocol in both cycling and anoestrus cows, and to evaluate a resynchronisation protocol, 742 cows averaging more than 40 days postpartum were assigned to the following four treatments: (1) ovsynch (OVS): day 0: GnRH; day 7: PGF2α; day 9: a similar dose of GnRH; day 10: timed artificial insemination (TAI), approximately 16?20 h later; (2) ovsynch+MAP (MAP): the same ovsynch protocol plus an intravaginal insert made of polyurethane sponge impregnated with 300 mg of MAP immediately after the first GnRH treatment and on day 7, at the time of the PG treatment, the sponge was removed; (3) resynchronisation (MAP+ODB): 1 mg of oestradiol benzoate (ODB) on day 13 after TAI and a new sponge impregnated with MAP was inserted and; on day 20, 1 mg of ODB was given and the sponge removed; and (4) no resynchronisation (No MAP): only oestrus detection and AI at any repeat oestrus detected after TAI. Progesterone was measured in milk samples collected on days −17, −10, −3, 13 and 20 (TAI=day 0). Based on milk P4 at days −17 and −10, 27.4% of the cows were still anoestrus. At PG injection, 67.7% of the cycling and 21.3% of the anoestrus cows had elevated P4. Farm, days postpartum and parity variations were detected in both cases. On day 20 after TAI 42.6% of cycling and 8.3% of the anoestrous cows had elevated P4. Pregnancy rates were similar in both pre-breeding treatments (20%), but interactions (P<0.001) were detected between treatment and cycling activity (for anoestrous cows: MAP=34.9%; OVS=11.1%. Average interval from TAI to subsequent AI was 37±3 days. Resynchronisation resulted in more (P<0.001) cows in oestrus between days 18 and 25 after TAI. Conception rate in the MAP+ODB treatment was lower (P<0.05) than the No MAP group (22.8% versus 47.4%). It was concluded that the addition of a progestin to the ovsynch protocol resulted in increased pregnancy rates of cows treated during anoestrus. The benefit of including MAP with the ovsynch protocol for cycling cows is equivocal.
© 2003 Elsevier Science B.V. All rights reserved. MenosABSTRACT.
To examine the outcomes of adding medroxyprogesterone acetate (MAP) to the ovsynch protocol with the traditional ovsynch protocol in both cycling and anoestrus cows, and to evaluate a resynchronisation protocol, 742 cows averaging more than 40 days postpartum were assigned to the following four treatments: (1) ovsynch (OVS): day 0: GnRH; day 7: PGF2α; day 9: a similar dose of GnRH; day 10: timed artificial insemination (TAI), approximately 16?20 h later; (2) ovsynch+MAP (MAP): the same ovsynch protocol plus an intravaginal insert made of polyurethane sponge impregnated with 300 mg of MAP immediately after the first GnRH treatment and on day 7, at the time of the PG treatment, the sponge was removed; (3) resynchronisation (MAP+ODB): 1 mg of oestradiol benzoate (ODB) on day 13 after TAI and a new sponge impregnated with MAP was inserted and; on day 20, 1 mg of ODB was given and the sponge removed; and (4) no resynchronisation (No MAP): only oestrus detection and AI at any repeat oestrus detected after TAI. Progesterone was measured in milk samples collected on days −17, −10, −3, 13 and 20 (TAI=day 0). Based on milk P4 at days −17 and −10, 27.4% of the cows were still anoestrus. At PG injection, 67.7% of the cycling and 21.3% of the anoestrus cows had elevated P4. Farm, days postpartum and parity variations were detected in both cases. On day 20 after TAI 42.6% of cycling and 8.3% of the anoestrous cows had elevated P4. Pregnancy rat... Presentar Todo |
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Palabras claves : |
DAIRY CATTLE; GRAZING; MAP; OVSYNCH; REPRODUCTION; RESYNCHRONISATION. |
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Asunto categoría : |
L01 Ganadería |
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Marc : |
LEADER 03202naa a2200277 a 4500
001 1012824
005 2019-10-04
008 2003 bl uuuu u00u1 u #d
022 $a0378-4320
024 7 $a10.1016/S0378-4320(03)00032-0$2DOI
100 1 $aCAVESTANY, D.
245 $aEvaluation of two different oestrus-synchronisation methods with timed artificial insemination and resynchronisation of returns to oestrus in lactating Holstein cows.$h[electronic resource]
260 $c2003
500 $aArticle history: Received 18 July 2002 / Received in revised form 23 December 2002 / Accepted 6 January 2003 / Available online 6 March 2003.
520 $aABSTRACT. To examine the outcomes of adding medroxyprogesterone acetate (MAP) to the ovsynch protocol with the traditional ovsynch protocol in both cycling and anoestrus cows, and to evaluate a resynchronisation protocol, 742 cows averaging more than 40 days postpartum were assigned to the following four treatments: (1) ovsynch (OVS): day 0: GnRH; day 7: PGF2α; day 9: a similar dose of GnRH; day 10: timed artificial insemination (TAI), approximately 16?20 h later; (2) ovsynch+MAP (MAP): the same ovsynch protocol plus an intravaginal insert made of polyurethane sponge impregnated with 300 mg of MAP immediately after the first GnRH treatment and on day 7, at the time of the PG treatment, the sponge was removed; (3) resynchronisation (MAP+ODB): 1 mg of oestradiol benzoate (ODB) on day 13 after TAI and a new sponge impregnated with MAP was inserted and; on day 20, 1 mg of ODB was given and the sponge removed; and (4) no resynchronisation (No MAP): only oestrus detection and AI at any repeat oestrus detected after TAI. Progesterone was measured in milk samples collected on days −17, −10, −3, 13 and 20 (TAI=day 0). Based on milk P4 at days −17 and −10, 27.4% of the cows were still anoestrus. At PG injection, 67.7% of the cycling and 21.3% of the anoestrus cows had elevated P4. Farm, days postpartum and parity variations were detected in both cases. On day 20 after TAI 42.6% of cycling and 8.3% of the anoestrous cows had elevated P4. Pregnancy rates were similar in both pre-breeding treatments (20%), but interactions (P<0.001) were detected between treatment and cycling activity (for anoestrous cows: MAP=34.9%; OVS=11.1%. Average interval from TAI to subsequent AI was 37±3 days. Resynchronisation resulted in more (P<0.001) cows in oestrus between days 18 and 25 after TAI. Conception rate in the MAP+ODB treatment was lower (P<0.05) than the No MAP group (22.8% versus 47.4%). It was concluded that the addition of a progestin to the ovsynch protocol resulted in increased pregnancy rates of cows treated during anoestrus. The benefit of including MAP with the ovsynch protocol for cycling cows is equivocal. © 2003 Elsevier Science B.V. All rights reserved.
653 $aDAIRY CATTLE
653 $aGRAZING
653 $aMAP
653 $aOVSYNCH
653 $aREPRODUCTION
653 $aRESYNCHRONISATION
700 1 $aCIBILS, J.
700 1 $aFREIRE, A.
700 1 $aSASTRE, A.
700 1 $aSTEVENSON, J.S.
773 $tAnimal Reproduction Science, 15 July 2003, 77 (3-4): 141-155.
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Registro original : |
INIA Las Brujas (LB) |
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Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
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Fecha actual : |
30/05/2019 |
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Actualizado : |
10/06/2019 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
Internacional - -- |
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Autor : |
ZAGO, D; CANOZZI, M.E.A.; BARCELLOS, J.O,J. |
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Afiliación : |
Department of Animal Science, Federal University of Rio Grande do Sul. Av. Bento Gonçalves n. 7712, 91540-000, Porto Alegre, RS, Brazil.; MARÍA EUGENIA ANDRIGHETTO CANOZZI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JULIO BARCELLOS, Department of Animal Science, Federal University of Rio Grande do Sul. Av. Bento Gonçalves n. 7712, 91540-000, Porto Alegre, RS, Brazil. |
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Título : |
Pregnant cow nutrition and its effects on foetal weight-a meta-analysis. |
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Fecha de publicación : |
2019 |
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Fuente / Imprenta : |
The Journal of Agricultural Science,Volume 157, Issue 1, January 2019 , pp. 83-95. |
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DOI : |
10.1017/S0021859619000315 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received: 5 December 2018//Revised: 5 March 2019//Accepted: 3 April 2019//First published online: 9 May 2019. |
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Contenido : |
Abstract:The prenatal development of cattle has influence on productive performance throughout postnatal life. The number of muscle and fat cells that the animal will have throughout its life is determined in the foetal stage and is influenced by nutrition of the pregnant cow. A systematic review and meta-analysis was performed to evaluate the effect of different energy levels (total digestible nutrient, TDN) and crude protein (CP) supplied to pregnant cows on foetal weight at 4 (FW4) and 8 months (FW8) and calf birth weight (CBW). Four studies and six trials involving 170 animals were assessed for FW4; four studies, four trials and 156 animals for FW8 and 48 studies, 125 trials and 9053 animals for CBW. High heterogeneity across studies was presented in FW4 (I2 = 94.4%), FW8 (I2 = 91.08%) and CBW (I2 = 96.9%). Dietary TDN and CP levels did not influence FW4. The FW8 was reduced by 2.24 kg when cows were fed 100% of their CP and TDN requirements (I2 = 0%), relative to those fed 70% of their requirements during the first and second trimesters. The CBW was reduced by 0.45 kg (I2 = 96.9%) when cows were fed 130% of their CP requirements relative to other dietary CP levels. When cows were fed 140% of their TDN requirements, CBW decreased by 2.71 kg (I2 = 98.3%) relative to other TDN levels. Dietary energy or CP levels fed above the requirements to pregnant cows restrict foetal development and CBW. |
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Palabras claves : |
BEEF CATTLE; BIRTH WEIGHT; COW-CALF HERD; FOETAL PROGRAMMING; FOETAL WEIGHT; PESO FETAL; VACA PREÑADA. |
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Thesagro : |
NUTRICIÓN ANIMAL. |
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Asunto categoría : |
L51 Fisiología Animal - Nutrición |
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Marc : |
LEADER 02310naa a2200265 a 4500
001 1059794
005 2019-06-10
008 2019 bl uuuu u00u1 u #d
024 7 $a10.1017/S0021859619000315$2DOI
100 1 $aZAGO, D
245 $aPregnant cow nutrition and its effects on foetal weight-a meta-analysis.$h[electronic resource]
260 $c2019
500 $aArticle history: Received: 5 December 2018//Revised: 5 March 2019//Accepted: 3 April 2019//First published online: 9 May 2019.
520 $aAbstract:The prenatal development of cattle has influence on productive performance throughout postnatal life. The number of muscle and fat cells that the animal will have throughout its life is determined in the foetal stage and is influenced by nutrition of the pregnant cow. A systematic review and meta-analysis was performed to evaluate the effect of different energy levels (total digestible nutrient, TDN) and crude protein (CP) supplied to pregnant cows on foetal weight at 4 (FW4) and 8 months (FW8) and calf birth weight (CBW). Four studies and six trials involving 170 animals were assessed for FW4; four studies, four trials and 156 animals for FW8 and 48 studies, 125 trials and 9053 animals for CBW. High heterogeneity across studies was presented in FW4 (I2 = 94.4%), FW8 (I2 = 91.08%) and CBW (I2 = 96.9%). Dietary TDN and CP levels did not influence FW4. The FW8 was reduced by 2.24 kg when cows were fed 100% of their CP and TDN requirements (I2 = 0%), relative to those fed 70% of their requirements during the first and second trimesters. The CBW was reduced by 0.45 kg (I2 = 96.9%) when cows were fed 130% of their CP requirements relative to other dietary CP levels. When cows were fed 140% of their TDN requirements, CBW decreased by 2.71 kg (I2 = 98.3%) relative to other TDN levels. Dietary energy or CP levels fed above the requirements to pregnant cows restrict foetal development and CBW.
650 $aNUTRICIÓN ANIMAL
653 $aBEEF CATTLE
653 $aBIRTH WEIGHT
653 $aCOW-CALF HERD
653 $aFOETAL PROGRAMMING
653 $aFOETAL WEIGHT
653 $aPESO FETAL
653 $aVACA PREÑADA
700 1 $aCANOZZI, M.E.A.
700 1 $aBARCELLOS, J.O,J.
773 $tThe Journal of Agricultural Science,Volume 157, Issue 1, January 2019 , pp. 83-95.
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