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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AudienciaPúblico en generales_ES
CoberturaMéxicoes_ES
Fecha de ingreso2026-10-05T16:34:23Z
Fecha de publicación2012-01-01
ResumenSynchronization 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.es_ES
URIhttps://riuat.uat.edu.mx/handle/123456789/6172
Idiomaenes_ES
EditorialUniversidad Autonoma de Yucatanes_ES
RelaciónTropical and Subtropical Agroecosystemses_ES
URL relacionadohttps://www.scopus.com/pages/publications/84879015988?origin=resultslistes_ES
DerechosAcceso restringido / Suscripción (Metadatos de producción científica)es_ES
Licenciahttp://purl.org/coar/access_right/c_16eces_ES
FuenteTropical and Subtropical Agroecosystems
Palabra claveBrahman cattlees_ES
Palabra claveEstradioles_ES
Palabra claveFixed-time AIes_ES
Palabra claveGnRHes_ES
Palabra claveOvulation synchronizationes_ES
TítuloComparison 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 Mexicoes_ES
TipoArtículoes_ES
ArbitradoHa sido Arbitradoes_ES
AutorDomínguez, Miguel A.
AutorVillegas-Gutiérrez, César I.
AutorGonzález-Gómez, Víctor P.
AutorSánchez-Torres, Ruby
AutorBenavides-González, Flaviano
AutorLópez-Zavala, Rigoberto
AutorMedellín-Ledezma, Jesús Antonio
AutorSalinas-Chavira, Jaime
AutorDomínguez, Miguel A.es_ES
AutorVillegas-Gutiérrez, César I.es_ES
AutorGonzález-Gómez, Víctor P.es_ES
AutorSánchez-Torres, Rubyes_ES
AutorBenavides-González, Flavianoes_ES
AutorLópez-Zavala, Rigobertoes_ES
AutorMedellín-Ledezma, Jesús Antonioes_ES
AutorSalinas-Chavira, Jaimees_ES
InstituciónUniversidad Autónoma de Tamaulipas
InstituciónUniversidad Autónoma de Tamaulipases_ES
Número3es_ES
Rango de páginas685-692es_ES
URL relacionadahttps://www.scopus.com/pages/publications/84879015988?origin=resultslist
Tipo de artículoIndexado
Tipo de artículoIndexadoes_ES
Volumen15es_ES

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