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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...
Autores principales: | , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Colégio Brasileiro de Reprodução Animal - CBRA
2019
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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. |
format | Online Article Text |
id | pubmed-7234102 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Colégio Brasileiro de Reprodução Animal - CBRA |
record_format | MEDLINE/PubMed |
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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