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Pre-TAI protocol strategies to increase reproductive efficiency in beef and dairy cows

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 pr...

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Autores principales: Sales, José Nélio de Sousa, Simões, Luiz Manoel Souza, Orlandi, Raphael Evangelista, Lima, Eduardo Alves, Santos, Ana Paula Castro, Bottino, Miguel Pizzolante, da Silva, Luiz Augusto Capellari Leite, de Souza, José Camisão, Dias, Marcelo Maronna, Massoneto, João Paulo Martinelli, Scandiuzzi, Luiz Antônio, Freitas, Bruno Gonzalez, Guerreiro, Bruna Martins, Bastos, Michele Ricieri
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Colégio Brasileiro de Reprodução Animal - CBRA 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7234102/
https://www.ncbi.nlm.nih.gov/pubmed/32435284
http://dx.doi.org/10.21451/1984-3143-AR2019-0041
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author Sales, José Nélio de Sousa
Simões, Luiz Manoel Souza
Orlandi, Raphael Evangelista
Lima, Eduardo Alves
Santos, Ana Paula Castro
Bottino, Miguel Pizzolante
da Silva, Luiz Augusto Capellari Leite
de Souza, José Camisão
Dias, Marcelo Maronna
Massoneto, João Paulo Martinelli
Scandiuzzi, Luiz Antônio
Freitas, Bruno Gonzalez
Guerreiro, Bruna Martins
Bastos, Michele Ricieri
author_facet Sales, José Nélio de Sousa
Simões, Luiz Manoel Souza
Orlandi, Raphael Evangelista
Lima, Eduardo Alves
Santos, Ana Paula Castro
Bottino, Miguel Pizzolante
da Silva, Luiz Augusto Capellari Leite
de Souza, José Camisão
Dias, Marcelo Maronna
Massoneto, João Paulo Martinelli
Scandiuzzi, Luiz Antônio
Freitas, Bruno Gonzalez
Guerreiro, Bruna Martins
Bastos, Michele Ricieri
author_sort Sales, José Nélio de Sousa
collection PubMed
description 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.
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spelling pubmed-72341022020-05-20 Pre-TAI protocol strategies to increase reproductive efficiency in beef and dairy cows Sales, José Nélio de Sousa Simões, Luiz Manoel Souza Orlandi, Raphael Evangelista Lima, Eduardo Alves Santos, Ana Paula Castro Bottino, Miguel Pizzolante da Silva, Luiz Augusto Capellari Leite de Souza, José Camisão Dias, Marcelo Maronna Massoneto, João Paulo Martinelli Scandiuzzi, Luiz Antônio Freitas, Bruno Gonzalez Guerreiro, Bruna Martins Bastos, Michele Ricieri Anim Reprod Congress Paper 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. Colégio Brasileiro de Reprodução Animal - CBRA 2019-10-23 /pmc/articles/PMC7234102/ /pubmed/32435284 http://dx.doi.org/10.21451/1984-3143-AR2019-0041 Text en Copyright © The Author(s). Published by CBRA. http://creativecommons.org/licenses/by/4.0/ This is an Open Access article under the Creative Commons Attribution License (CC BY 4.0 license)
spellingShingle Congress Paper
Sales, José Nélio de Sousa
Simões, Luiz Manoel Souza
Orlandi, Raphael Evangelista
Lima, Eduardo Alves
Santos, Ana Paula Castro
Bottino, Miguel Pizzolante
da Silva, Luiz Augusto Capellari Leite
de Souza, José Camisão
Dias, Marcelo Maronna
Massoneto, João Paulo Martinelli
Scandiuzzi, Luiz Antônio
Freitas, Bruno Gonzalez
Guerreiro, Bruna Martins
Bastos, Michele Ricieri
Pre-TAI protocol strategies to increase reproductive efficiency in beef and dairy cows
title Pre-TAI protocol strategies to increase reproductive efficiency in beef and dairy cows
title_full Pre-TAI protocol strategies to increase reproductive efficiency in beef and dairy cows
title_fullStr Pre-TAI protocol strategies to increase reproductive efficiency in beef and dairy cows
title_full_unstemmed Pre-TAI protocol strategies to increase reproductive efficiency in beef and dairy cows
title_short Pre-TAI protocol strategies to increase reproductive efficiency in beef and dairy cows
title_sort pre-tai protocol strategies to increase reproductive efficiency in beef and dairy cows
topic Congress Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7234102/
https://www.ncbi.nlm.nih.gov/pubmed/32435284
http://dx.doi.org/10.21451/1984-3143-AR2019-0041
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