Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/40600
metadata.artigo.dc.title: Pre-TAI protocol strategies to increase reproductive efficiency in beef and dairy cows
metadata.artigo.dc.creator: Sales, José Nélio de Sousa
Simões, Luiz Manoel Souza
Orlandi, Raphael Evangelista
Lima, Eduardo Alves
Santos, Ana Paula Castro
Bottino, Miguel Pizzolante
Silva, Luiz Augusto Capellari Leite da
Souza, José Camisão de
Dias, Marcelo Maronna
Massoneto, João Paulo Martinelli
Scandiuzzi Junior, Luiz Antônio
Freitas, Bruno Gonzalez
Guerreiro, Bruna Martins
Bastos, Michele Ricieri
metadata.artigo.dc.subject: Conception rate
Timed artificial insemination
Progesterone
Vacas leiteiras - Reprodução
Taxa de concepção
Inseminação artificial
Hormônio luteinizante
Progesterona
metadata.artigo.dc.publisher: Colégio Brasileiro de Reprodução Animal
metadata.artigo.dc.date.issued: 2019
metadata.artigo.dc.identifier.citation: SALES, J. N. de S. et al. Pre-TAI protocol strategies to increase reproductive efficiency in beef and dairy cows. Animal Reproduction, Belo Horizonte, v. 16, n. 3, p. 402-410, Jul./Sept. 2019.
metadata.artigo.dc.description.abstract: Ovulation synchronization protocols are well established in beef and dairy cows. However, the protocol response rate is around 70-90%. In beef cows, factors such as inadequate nutrition and calf presence negatively impact the response of progesterone (P4)/estradiol-based ovulation synchronization protocols by interfering with GnRH release and consequently reducing LH pulsatility and final follicular development. In dairy cows, protocols based on GnRH and prostaglandin (Ovsynch) are the most widely used in the world. However, the efficiency of Ovsynch is dependent on the presence of a large follicle at the time of administration of the first GnRH. In these ovulation synchronization protocols, pre-synchronization protocols (Prostaglandins, Double Ovsynch and P4synch) are usually attempted in an effort to increase responses. Thus, the objective of this review was to discuss pre-ovulation synchronization strategies (administration of injectable P4 or energetic/protein supplementation or pre-synchronization with intra-vaginal progesterone devices) aiming to increase the LH pulsatility in beef cows or induce the formation of a GnRH-responsive follicle at the beginning of the Ovsynch protocol in dairy cows.
metadata.artigo.dc.identifier.uri: http://repositorio.ufla.br/jspui/handle/1/40600
metadata.artigo.dc.language: en
Appears in Collections:DZO - Artigos publicados em periódicos



This item is licensed under a Creative Commons License Creative Commons