Consulta: subjectFacets:"Synchronization of ovulation"
Registros recuperados: 4
Data/hora: 10/06/2024 14:53:43

The applications of timed artificial insemination and timed embryo transfer in reproductive management of dairy cattle
Provedor de dados: 96
Autores: Ambrose,Divakar Justus; Colazo,Marcos Germán; Kastelic,John Patrick.
Fertility of dairy cattle is generally decreasing. Overall estrus detection efficiency in lactating dairy cattle is low, as expression of estrus is often compromised. Consequently, undetected estrus, low AI-submission rates, and long inter-breeding intervals are the main contributors to poor reproductive efficiency. Although failure to become pregnant is the most common reason for culling dairy cattle, pregnancy rates could be improved by increasing the AI-submission rate through increased estrus detection efficiency, timed insemination (Timed-AI), or timed embryo transfer (Timed-ET). In these protocols, ovarian follicular development and luteolysis are controlled, culminating in synchronous ovulation in most cows. There are several modifications to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cystic ovaries; Gonadotropin releasing hormone; Porcine luteinizing hormone; Progesterone; Synchronization of ovulation; Ultrasonography.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001300042

Half dose of prostaglandin F2a is effective to induce luteolysis in the synchronization of ovulation protocol for fixed-time artificial insemination in buffalo (Bubalus bubalis)
Provedor de dados: 62
Autores: Baruselli,Pietro Sampaio; Berber,Rodolfo Cassimiro de Araújo; Madureira,Ed Hoffman; Carvalho,Nelcio Antonio Tonizza de.
The objective of this study was to evaluate the efficiency of half dose of PGF2alpha in the synchronization of ovulation protocol (GnRH/PGF2alpha/GnRH) for fixed-time artificial insemination in buffalo. Two hundred and sixty two buffaloes (³40 days postpartum) were divided in 2 groups (Group 1, n = 125, GnRH/ ½ dose de PGF2alpha/GnRH; Control Group, n = 137, GnRH/PGF2alpha/GnRH). Animals in Group 1 received 25mg of GnRH IM (Lecirelin, Gestran-plus®) and, seven days later, half dose of PGF2alpha IM (75mg d-cloprostenol, Preloban®). Two days after PGF2alpha injection, all animals received 25mg of GnRH IM (Lecirelin). Animals in Control Group received the same treatment, except for the dose of PGF2alpha(150mg, IM, d-cloprostenol, Preloban®). All animals were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Synchronization of ovulation; Dinoprost; Buffalo.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962003000600002

Evaluation of synchronization of ovulation for fixed timed insemination in buffalo (Bubalus bubalis)
Provedor de dados: 62
Autores: Baruselli,Pietro Sampaio; Madureira,Ed Hoffman; Barnabe,Valquíria Hippollito; Barnabe,Renato Campanarut; Berber,Rodolfo Cassimiro de Araújo.
The objective of this study was to evaluate the efficiency of synchronization ovulation protocol (GnRH/PGF2alpha/GnRH) for fixed timed insemination in buffalo. In Experiment 1, thirty-three female buffaloes with 60 days postpartum, were divided in two groups for evaluation of the follicular dynamics (Group 1, n = 16, 10mg of GnRH/15mg of PGF2alpha/10mg of GnRH; Group 2, n = 17, 20mg of GnRH/15mg of PGF2alpha/10mg of GnRH). Ultrasonography exams were performed every 12 hours to verify the ovarian response to the first GnRH injection. Another evaluations were performed on PGF2a injection and second GnRH injection. After last hormonal injection, ultrasonography exams were performed every 6 hours to verify the moment of the ovulation. Blood samples were...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Synchronization of ovulation; GnRH; Buffalo; Ovsynch.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962003000600007

Lecirelin and Buserelin (Gonadotrophin releasing hormone agonists) are equally effective for fixed time insemination in buffalo
Provedor de dados: 62
Autores: BARUSELLI,Pietro Sampaio; AMARAL,Renato; BARUFI,Francisco Bonomi; VALENTIM,Renato; MARQUES,Marcio de Oliveira.
Buffalo has peculiar reproductive patterns, which make artificial insemination programs a hard and expensive task. Artificial insemination in fixed time is advantaged because females show low incidence of homosexual behaviour and strong dominance relationships, which leads to a poor accuracy in estrus detection. The aim of this experiment was to compare the efficiency of two different GnRH agonists in the GnRH/PGF2alpha/GnRH protocol (Buserelin vs Lecirelin). Two hundred and seventy buffaloes with 45 to 60 days postpartum were synchronized and fixed-time inseminated. The animals were kept on pasture in two farms at São Paulo and Mato Grosso do Sul (Brazil). Cows in Group 1 (n = 132) received, intramuscularly, 20 µg of Buserelin at a random day of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Buffalo; Synchronization of ovulation; GnRH; Lecirelin; Buserelin.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962001000300009