COMPARISON BETWEEN ESTRADIOL CYPIONATE AND GONADOTROPIN RELEASING HORMONE AS OVULATION SYNCHRONIZATION TREATMENTS FOR FIXED-TIME ARTIFICIAL INSEMINATION PROGRAMS IN BRAHMAN-CROSS HEIFERS IN A SUBTROPICAL REGION OF NORTHEASTERN MEXICO
Synchronization protocols with intravaginal progesterone releasing devices (CIDR) and PGF2α were evaluated, with GnRH or estradiol cypionate (ECP) added for fixed-time artificial insemination (FTAI) in five counties in Tamaulipas, Mexico. Brahman-cross heifers (≥15 months old) were selected based...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Miguel Angel Dominguez [verfasserIn] C.I. Villegas-Gutiérrez [verfasserIn] V.P. González-Gómez [verfasserIn] R. Sánchez-Torres [verfasserIn] F. Benavides-González [verfasserIn] R. López-Zavala [verfasserIn] J.A. MedellÃn-Ledezma [verfasserIn] J. Salinas-Chavira [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch ; Spanisch |
| Erschienen: |
2012 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
In: Tropical and Subtropical Agroecosystems - Universidad Autónoma de Yucatán, 2009, 15(2012), 3 |
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| Übergeordnetes Werk: |
volume:15 ; year:2012 ; number:3 |
| Links: |
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| Katalog-ID: |
DOAJ015160920 |
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| 520 | |a Synchronization protocols with intravaginal progesterone releasing devices (CIDR) and PGF2α were evaluated, with GnRH or estradiol cypionate (ECP) added for fixed-time artificial insemination (FTAI) in five counties in Tamaulipas, Mexico. Brahman-cross heifers (≥15 months old) were selected based on body condition (≥3 on a 5-point scale) and confirmed ovarian activity. The six treatments (n = 320 each) were: T1 (9-d CIDR, ECP on insertion, PGF2α on day 9, ECP on day 10, FTAI 54 h after removal); T2 (7-d CIDR, ECP on insertion, PGF2α on day 7, ECP on day 8, FTAI 54 h after removal); T3 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI and GnRH 48 h after removal); T4 (7-d CIDR, GnRH on insertion, PGF2α on day 6, FTAI and GnRH 48 h after removal); T5 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI and GnRH 60 h after removal); and T6 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI alone 48 h after removal). Pregnancy was diagnosed ultrasonically 45 days after FTAI. Analyses included pregnancy rates and treatment costs (hormones and handling). Pregnancy rates ranged from 31.6 ± 3.9 to 48.0 ± 10.6%; neither treatment nor county affected these rates (p < 0.05). In conclusion, the inclusion of treatment costs showed two more economical treatments (T2 using estradiol or T3 using GnRH) under the nutritional, weather and handling conditions present in the tropical region of southeastern Tamaulipas. | ||
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(DE-627)DOAJ015160920 (DE-599)DOAJda6e7cacadb94ea8931a77769919c9ea DE-627 ger DE-627 rakwb eng spa S1-972 Miguel Angel Dominguez verfasserin aut COMPARISON BETWEEN ESTRADIOL CYPIONATE AND GONADOTROPIN RELEASING HORMONE AS OVULATION SYNCHRONIZATION TREATMENTS FOR FIXED-TIME ARTIFICIAL INSEMINATION PROGRAMS IN BRAHMAN-CROSS HEIFERS IN A SUBTROPICAL REGION OF NORTHEASTERN MEXICO 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Synchronization protocols with intravaginal progesterone releasing devices (CIDR) and PGF2α were evaluated, with GnRH or estradiol cypionate (ECP) added for fixed-time artificial insemination (FTAI) in five counties in Tamaulipas, Mexico. Brahman-cross heifers (≥15 months old) were selected based on body condition (≥3 on a 5-point scale) and confirmed ovarian activity. The six treatments (n = 320 each) were: T1 (9-d CIDR, ECP on insertion, PGF2α on day 9, ECP on day 10, FTAI 54 h after removal); T2 (7-d CIDR, ECP on insertion, PGF2α on day 7, ECP on day 8, FTAI 54 h after removal); T3 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI and GnRH 48 h after removal); T4 (7-d CIDR, GnRH on insertion, PGF2α on day 6, FTAI and GnRH 48 h after removal); T5 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI and GnRH 60 h after removal); and T6 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI alone 48 h after removal). Pregnancy was diagnosed ultrasonically 45 days after FTAI. Analyses included pregnancy rates and treatment costs (hormones and handling). Pregnancy rates ranged from 31.6 ± 3.9 to 48.0 ± 10.6%; neither treatment nor county affected these rates (p < 0.05). In conclusion, the inclusion of treatment costs showed two more economical treatments (T2 using estradiol or T3 using GnRH) under the nutritional, weather and handling conditions present in the tropical region of southeastern Tamaulipas. ovulation synchronization Brahman cattle fixed-time AI GnRH estradiol Agriculture S Agriculture (General) C.I. Villegas-Gutiérrez verfasserin aut V.P. González-Gómez verfasserin aut R. Sánchez-Torres verfasserin aut F. Benavides-González verfasserin aut R. López-Zavala verfasserin aut J.A. MedellÃn-Ledezma verfasserin aut J. Salinas-Chavira verfasserin aut In Tropical and Subtropical Agroecosystems Universidad Autónoma de Yucatán, 2009 15(2012), 3 (DE-627)594779391 (DE-600)2486562-X 18700462 nnns volume:15 year:2012 number:3 https://doaj.org/article/da6e7cacadb94ea8931a77769919c9ea kostenfrei http://www.revista.ccba.uady.mx/ojs/index.php/TSA/article/view/1415 kostenfrei https://doaj.org/toc/1870-0462 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 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_4367 GBV_ILN_4700 AR 15 2012 3 |
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(DE-627)DOAJ015160920 (DE-599)DOAJda6e7cacadb94ea8931a77769919c9ea DE-627 ger DE-627 rakwb eng spa S1-972 Miguel Angel Dominguez verfasserin aut COMPARISON BETWEEN ESTRADIOL CYPIONATE AND GONADOTROPIN RELEASING HORMONE AS OVULATION SYNCHRONIZATION TREATMENTS FOR FIXED-TIME ARTIFICIAL INSEMINATION PROGRAMS IN BRAHMAN-CROSS HEIFERS IN A SUBTROPICAL REGION OF NORTHEASTERN MEXICO 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Synchronization protocols with intravaginal progesterone releasing devices (CIDR) and PGF2α were evaluated, with GnRH or estradiol cypionate (ECP) added for fixed-time artificial insemination (FTAI) in five counties in Tamaulipas, Mexico. Brahman-cross heifers (≥15 months old) were selected based on body condition (≥3 on a 5-point scale) and confirmed ovarian activity. The six treatments (n = 320 each) were: T1 (9-d CIDR, ECP on insertion, PGF2α on day 9, ECP on day 10, FTAI 54 h after removal); T2 (7-d CIDR, ECP on insertion, PGF2α on day 7, ECP on day 8, FTAI 54 h after removal); T3 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI and GnRH 48 h after removal); T4 (7-d CIDR, GnRH on insertion, PGF2α on day 6, FTAI and GnRH 48 h after removal); T5 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI and GnRH 60 h after removal); and T6 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI alone 48 h after removal). Pregnancy was diagnosed ultrasonically 45 days after FTAI. Analyses included pregnancy rates and treatment costs (hormones and handling). Pregnancy rates ranged from 31.6 ± 3.9 to 48.0 ± 10.6%; neither treatment nor county affected these rates (p < 0.05). In conclusion, the inclusion of treatment costs showed two more economical treatments (T2 using estradiol or T3 using GnRH) under the nutritional, weather and handling conditions present in the tropical region of southeastern Tamaulipas. ovulation synchronization Brahman cattle fixed-time AI GnRH estradiol Agriculture S Agriculture (General) C.I. Villegas-Gutiérrez verfasserin aut V.P. González-Gómez verfasserin aut R. Sánchez-Torres verfasserin aut F. Benavides-González verfasserin aut R. López-Zavala verfasserin aut J.A. MedellÃn-Ledezma verfasserin aut J. Salinas-Chavira verfasserin aut In Tropical and Subtropical Agroecosystems Universidad Autónoma de Yucatán, 2009 15(2012), 3 (DE-627)594779391 (DE-600)2486562-X 18700462 nnns volume:15 year:2012 number:3 https://doaj.org/article/da6e7cacadb94ea8931a77769919c9ea kostenfrei http://www.revista.ccba.uady.mx/ojs/index.php/TSA/article/view/1415 kostenfrei https://doaj.org/toc/1870-0462 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 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_4367 GBV_ILN_4700 AR 15 2012 3 |
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(DE-627)DOAJ015160920 (DE-599)DOAJda6e7cacadb94ea8931a77769919c9ea DE-627 ger DE-627 rakwb eng spa S1-972 Miguel Angel Dominguez verfasserin aut COMPARISON BETWEEN ESTRADIOL CYPIONATE AND GONADOTROPIN RELEASING HORMONE AS OVULATION SYNCHRONIZATION TREATMENTS FOR FIXED-TIME ARTIFICIAL INSEMINATION PROGRAMS IN BRAHMAN-CROSS HEIFERS IN A SUBTROPICAL REGION OF NORTHEASTERN MEXICO 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Synchronization protocols with intravaginal progesterone releasing devices (CIDR) and PGF2α were evaluated, with GnRH or estradiol cypionate (ECP) added for fixed-time artificial insemination (FTAI) in five counties in Tamaulipas, Mexico. Brahman-cross heifers (≥15 months old) were selected based on body condition (≥3 on a 5-point scale) and confirmed ovarian activity. The six treatments (n = 320 each) were: T1 (9-d CIDR, ECP on insertion, PGF2α on day 9, ECP on day 10, FTAI 54 h after removal); T2 (7-d CIDR, ECP on insertion, PGF2α on day 7, ECP on day 8, FTAI 54 h after removal); T3 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI and GnRH 48 h after removal); T4 (7-d CIDR, GnRH on insertion, PGF2α on day 6, FTAI and GnRH 48 h after removal); T5 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI and GnRH 60 h after removal); and T6 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI alone 48 h after removal). Pregnancy was diagnosed ultrasonically 45 days after FTAI. Analyses included pregnancy rates and treatment costs (hormones and handling). Pregnancy rates ranged from 31.6 ± 3.9 to 48.0 ± 10.6%; neither treatment nor county affected these rates (p < 0.05). In conclusion, the inclusion of treatment costs showed two more economical treatments (T2 using estradiol or T3 using GnRH) under the nutritional, weather and handling conditions present in the tropical region of southeastern Tamaulipas. ovulation synchronization Brahman cattle fixed-time AI GnRH estradiol Agriculture S Agriculture (General) C.I. Villegas-Gutiérrez verfasserin aut V.P. González-Gómez verfasserin aut R. Sánchez-Torres verfasserin aut F. Benavides-González verfasserin aut R. López-Zavala verfasserin aut J.A. MedellÃn-Ledezma verfasserin aut J. Salinas-Chavira verfasserin aut In Tropical and Subtropical Agroecosystems Universidad Autónoma de Yucatán, 2009 15(2012), 3 (DE-627)594779391 (DE-600)2486562-X 18700462 nnns volume:15 year:2012 number:3 https://doaj.org/article/da6e7cacadb94ea8931a77769919c9ea kostenfrei http://www.revista.ccba.uady.mx/ojs/index.php/TSA/article/view/1415 kostenfrei https://doaj.org/toc/1870-0462 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 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_4367 GBV_ILN_4700 AR 15 2012 3 |
| allfieldsGer |
(DE-627)DOAJ015160920 (DE-599)DOAJda6e7cacadb94ea8931a77769919c9ea DE-627 ger DE-627 rakwb eng spa S1-972 Miguel Angel Dominguez verfasserin aut COMPARISON BETWEEN ESTRADIOL CYPIONATE AND GONADOTROPIN RELEASING HORMONE AS OVULATION SYNCHRONIZATION TREATMENTS FOR FIXED-TIME ARTIFICIAL INSEMINATION PROGRAMS IN BRAHMAN-CROSS HEIFERS IN A SUBTROPICAL REGION OF NORTHEASTERN MEXICO 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Synchronization protocols with intravaginal progesterone releasing devices (CIDR) and PGF2α were evaluated, with GnRH or estradiol cypionate (ECP) added for fixed-time artificial insemination (FTAI) in five counties in Tamaulipas, Mexico. Brahman-cross heifers (≥15 months old) were selected based on body condition (≥3 on a 5-point scale) and confirmed ovarian activity. The six treatments (n = 320 each) were: T1 (9-d CIDR, ECP on insertion, PGF2α on day 9, ECP on day 10, FTAI 54 h after removal); T2 (7-d CIDR, ECP on insertion, PGF2α on day 7, ECP on day 8, FTAI 54 h after removal); T3 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI and GnRH 48 h after removal); T4 (7-d CIDR, GnRH on insertion, PGF2α on day 6, FTAI and GnRH 48 h after removal); T5 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI and GnRH 60 h after removal); and T6 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI alone 48 h after removal). Pregnancy was diagnosed ultrasonically 45 days after FTAI. Analyses included pregnancy rates and treatment costs (hormones and handling). Pregnancy rates ranged from 31.6 ± 3.9 to 48.0 ± 10.6%; neither treatment nor county affected these rates (p < 0.05). In conclusion, the inclusion of treatment costs showed two more economical treatments (T2 using estradiol or T3 using GnRH) under the nutritional, weather and handling conditions present in the tropical region of southeastern Tamaulipas. ovulation synchronization Brahman cattle fixed-time AI GnRH estradiol Agriculture S Agriculture (General) C.I. Villegas-Gutiérrez verfasserin aut V.P. González-Gómez verfasserin aut R. Sánchez-Torres verfasserin aut F. Benavides-González verfasserin aut R. López-Zavala verfasserin aut J.A. MedellÃn-Ledezma verfasserin aut J. Salinas-Chavira verfasserin aut In Tropical and Subtropical Agroecosystems Universidad Autónoma de Yucatán, 2009 15(2012), 3 (DE-627)594779391 (DE-600)2486562-X 18700462 nnns volume:15 year:2012 number:3 https://doaj.org/article/da6e7cacadb94ea8931a77769919c9ea kostenfrei http://www.revista.ccba.uady.mx/ojs/index.php/TSA/article/view/1415 kostenfrei https://doaj.org/toc/1870-0462 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 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_4367 GBV_ILN_4700 AR 15 2012 3 |
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S1-972 COMPARISON BETWEEN ESTRADIOL CYPIONATE AND GONADOTROPIN RELEASING HORMONE AS OVULATION SYNCHRONIZATION TREATMENTS FOR FIXED-TIME ARTIFICIAL INSEMINATION PROGRAMS IN BRAHMAN-CROSS HEIFERS IN A SUBTROPICAL REGION OF NORTHEASTERN MEXICO ovulation synchronization Brahman cattle fixed-time AI GnRH estradiol |
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comparison between estradiol cypionate and gonadotropin releasing hormone as ovulation synchronization treatments for fixed-time artificial insemination programs in brahman-cross heifers in a subtropical region of northeastern mexico |
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COMPARISON BETWEEN ESTRADIOL CYPIONATE AND GONADOTROPIN RELEASING HORMONE AS OVULATION SYNCHRONIZATION TREATMENTS FOR FIXED-TIME ARTIFICIAL INSEMINATION PROGRAMS IN BRAHMAN-CROSS HEIFERS IN A SUBTROPICAL REGION OF NORTHEASTERN MEXICO |
| abstract |
Synchronization protocols with intravaginal progesterone releasing devices (CIDR) and PGF2α were evaluated, with GnRH or estradiol cypionate (ECP) added for fixed-time artificial insemination (FTAI) in five counties in Tamaulipas, Mexico. Brahman-cross heifers (≥15 months old) were selected based on body condition (≥3 on a 5-point scale) and confirmed ovarian activity. The six treatments (n = 320 each) were: T1 (9-d CIDR, ECP on insertion, PGF2α on day 9, ECP on day 10, FTAI 54 h after removal); T2 (7-d CIDR, ECP on insertion, PGF2α on day 7, ECP on day 8, FTAI 54 h after removal); T3 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI and GnRH 48 h after removal); T4 (7-d CIDR, GnRH on insertion, PGF2α on day 6, FTAI and GnRH 48 h after removal); T5 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI and GnRH 60 h after removal); and T6 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI alone 48 h after removal). Pregnancy was diagnosed ultrasonically 45 days after FTAI. Analyses included pregnancy rates and treatment costs (hormones and handling). Pregnancy rates ranged from 31.6 ± 3.9 to 48.0 ± 10.6%; neither treatment nor county affected these rates (p < 0.05). In conclusion, the inclusion of treatment costs showed two more economical treatments (T2 using estradiol or T3 using GnRH) under the nutritional, weather and handling conditions present in the tropical region of southeastern Tamaulipas. |
| abstractGer |
Synchronization protocols with intravaginal progesterone releasing devices (CIDR) and PGF2α were evaluated, with GnRH or estradiol cypionate (ECP) added for fixed-time artificial insemination (FTAI) in five counties in Tamaulipas, Mexico. Brahman-cross heifers (≥15 months old) were selected based on body condition (≥3 on a 5-point scale) and confirmed ovarian activity. The six treatments (n = 320 each) were: T1 (9-d CIDR, ECP on insertion, PGF2α on day 9, ECP on day 10, FTAI 54 h after removal); T2 (7-d CIDR, ECP on insertion, PGF2α on day 7, ECP on day 8, FTAI 54 h after removal); T3 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI and GnRH 48 h after removal); T4 (7-d CIDR, GnRH on insertion, PGF2α on day 6, FTAI and GnRH 48 h after removal); T5 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI and GnRH 60 h after removal); and T6 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI alone 48 h after removal). Pregnancy was diagnosed ultrasonically 45 days after FTAI. Analyses included pregnancy rates and treatment costs (hormones and handling). Pregnancy rates ranged from 31.6 ± 3.9 to 48.0 ± 10.6%; neither treatment nor county affected these rates (p < 0.05). In conclusion, the inclusion of treatment costs showed two more economical treatments (T2 using estradiol or T3 using GnRH) under the nutritional, weather and handling conditions present in the tropical region of southeastern Tamaulipas. |
| abstract_unstemmed |
Synchronization protocols with intravaginal progesterone releasing devices (CIDR) and PGF2α were evaluated, with GnRH or estradiol cypionate (ECP) added for fixed-time artificial insemination (FTAI) in five counties in Tamaulipas, Mexico. Brahman-cross heifers (≥15 months old) were selected based on body condition (≥3 on a 5-point scale) and confirmed ovarian activity. The six treatments (n = 320 each) were: T1 (9-d CIDR, ECP on insertion, PGF2α on day 9, ECP on day 10, FTAI 54 h after removal); T2 (7-d CIDR, ECP on insertion, PGF2α on day 7, ECP on day 8, FTAI 54 h after removal); T3 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI and GnRH 48 h after removal); T4 (7-d CIDR, GnRH on insertion, PGF2α on day 6, FTAI and GnRH 48 h after removal); T5 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI and GnRH 60 h after removal); and T6 (7-d CIDR, GnRH on insertion, PGF2α on day 7, FTAI alone 48 h after removal). Pregnancy was diagnosed ultrasonically 45 days after FTAI. Analyses included pregnancy rates and treatment costs (hormones and handling). Pregnancy rates ranged from 31.6 ± 3.9 to 48.0 ± 10.6%; neither treatment nor county affected these rates (p < 0.05). In conclusion, the inclusion of treatment costs showed two more economical treatments (T2 using estradiol or T3 using GnRH) under the nutritional, weather and handling conditions present in the tropical region of southeastern Tamaulipas. |
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COMPARISON BETWEEN ESTRADIOL CYPIONATE AND GONADOTROPIN RELEASING HORMONE AS OVULATION SYNCHRONIZATION TREATMENTS FOR FIXED-TIME ARTIFICIAL INSEMINATION PROGRAMS IN BRAHMAN-CROSS HEIFERS IN A SUBTROPICAL REGION OF NORTHEASTERN MEXICO |
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https://doaj.org/article/da6e7cacadb94ea8931a77769919c9ea http://www.revista.ccba.uady.mx/ojs/index.php/TSA/article/view/1415 https://doaj.org/toc/1870-0462 |
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C.I. Villegas-Gutiérrez V.P. González-Gómez R. Sánchez-Torres F. Benavides-González R. López-Zavala J.A. MedellÃn-Ledezma J. Salinas-Chavira |
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C.I. Villegas-Gutiérrez V.P. González-Gómez R. Sánchez-Torres F. Benavides-González R. López-Zavala J.A. MedellÃn-Ledezma J. Salinas-Chavira |
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