Joaquim Esquerdo Ferreira
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View article: Efficacy of Short‐Term Timed Artificial Insemination Protocols With Estradiol Esters and <scp>PGF2α</scp> in Girolando Cows
Efficacy of Short‐Term Timed Artificial Insemination Protocols With Estradiol Esters and <span>PGF2α</span> in Girolando Cows Open
Using a synchronisation protocol based on estradiol esters and prostaglandin, established in cattle since the 1970s, we implemented 24 or 48‐h intervals between hormone administration and timed artificial insemination (TAI). This study com…
View article: Use of Progesterone as a Strategy to Improve Reproductive Efficiency in Cattle
Use of Progesterone as a Strategy to Improve Reproductive Efficiency in Cattle Open
Progesterone (P4) is a key hormone in the reproductive physiology of cattle, playing a crucial role in regulating the estrous cycle and establishing and maintaining the pregnancy. In the context of reproductive efficiency, the use of P4 ha…
View article: Effect of long-acting injectable progesterone supplementation, seven days after insemination, on embryo and fetal development in Nellore cows
Effect of long-acting injectable progesterone supplementation, seven days after insemination, on embryo and fetal development in Nellore cows Open
This study evaluated the effects of long-acting injectable progesterone supplementation (P4LA) on embryonic and fetal development and birth weight in Nellore cows seven days after timed artificial insemination (TAI). One hundred and ninete…
View article: Identification of Pentatrichomonas hominis in preputial washes of bulls in Brazil
Identification of Pentatrichomonas hominis in preputial washes of bulls in Brazil Open
The parabasalid Pentatrichomonas hominis is generally considered to represent a symbiotic component of the gastrointestinal microbiota in a wide variety of vertebrate hosts including humans. Nevertheless, a limited number of studies have r…
View article: Influence of age and weight of Girolando heifers on uterine and ovarian development
Influence of age and weight of Girolando heifers on uterine and ovarian development Open
The present study aimed to correlate the age and weight of Girolando heifers with uterine and ovarian development. Sixty heifers between 12 and 36 months old were weighed and subjected to ultrasound assessment to measure the diameters of e…
View article: Weaning weight and optimization of reproductive efficiency in Nellore females subjected to timed artificial insemination
Weaning weight and optimization of reproductive efficiency in Nellore females subjected to timed artificial insemination Open
The objective of this study was to evaluate the effect of timed artificial insemination (TAI) on pregnancy rates, reproductive efficiency, and mean weaning weight of calves at the end of breeding season in Nellore females. In this work, 74…
View article: Weaning weight and optimization of reproductive efficiency in Nellore females subjected to timed artificial insemination
Weaning weight and optimization of reproductive efficiency in Nellore females subjected to timed artificial insemination Open
The objective of this study was to evaluate the effect of timed artificial insemination (TAI) on pregnancy rates, reproductive efficiency, and mean weaning weight of calves at the end of breeding season in Nellore females. In this work, 74…
View article: Ultrasonographic evaluation of the reproductive tract as predictors of pregnancy in Girolando heifers submitted to Timed Artificial Insemination
Ultrasonographic evaluation of the reproductive tract as predictors of pregnancy in Girolando heifers submitted to Timed Artificial Insemination Open
The objective of this study was to evaluate the influence of the degree of uterine and ovarian development on the pregnancy rate of Girolando heifers submitted to Timed Artificial Insemination (TAI). Fifty-six heifers, representing 100% of…
View article: Influence of age and weight of Girolando heifers on uterine and ovarian development
Influence of age and weight of Girolando heifers on uterine and ovarian development Open
The present study aimed to correlate the age and weight of Girolando heifers with uterine and ovarian development. Sixty heifers between 12 and 36 months old were weighed and subjected to ultrasound assessment to measure the diameters of e…
View article: Comparison of estradiol benzoate and cypionate in Girolando cows submitted to a timed artificial insemination
Comparison of estradiol benzoate and cypionate in Girolando cows submitted to a timed artificial insemination Open
The various studies on the manipulation of the estrous cycle culminated in the development of estrous and ovulation synchronization protocols, to the point of defining an optimum moment for artificial insemination. The induction of ovulati…
View article: Principal component and cluster analyses of production and fertility traits in Red Sindhi dairy cattle breed in Brazil
Principal component and cluster analyses of production and fertility traits in Red Sindhi dairy cattle breed in Brazil Open
View article: Biotécnicas da reprodução aplicada aos bubalinos (Bubalus Bubalis)
Biotécnicas da reprodução aplicada aos bubalinos (Bubalus Bubalis) Open
The buffalo breeding is spreading worldwide due to the superiority which may have in relation to other domestic ruminants, especially the adaptation of different climatic conditions of the Brazilian territory, and to produce meat and milk …
View article: Reproductive biotechniques applied to buffalos (Bubalus bubalis).
Reproductive biotechniques applied to buffalos (Bubalus bubalis). Open
View article: Parâmetros da produção in vitro de embriões da raça Sindi
Parâmetros da produção in vitro de embriões da raça Sindi Open
Resumo: O objetivo deste trabalho foi avaliar os efeitos da doadora, estação do ano, do touro e do tipo de sêmen, na produção in vitro de embriões da raça Sindi (Bos indicus). Para isso, avaliaram-se 434 sessões de aspiração folicular in v…
View article: INFLUÊNCIA DO MANEJO NA FISIOLOGIA REPRODUTIVA DO MACHO BOVINO
INFLUÊNCIA DO MANEJO NA FISIOLOGIA REPRODUTIVA DO MACHO BOVINO Open
O conhecimento da fisiologia do desenvolvimento testicular e ponderal, a precocidade sexual, a capacidade de produção e qualidade espermática, além dos fatores que potencialmente interferem nestes processos, são importantes para predizer a…
View article: Reproductive performance of Nelore cows submitted to FTAI and exposed to clean-up bulls
Reproductive performance of Nelore cows submitted to FTAI and exposed to clean-up bulls Open
The aim of this study was to evaluate the effect of FTAI associated with clean-up bulls on reproductive efficiency of Nellore females in a breeding season from November 2013 to June 2014. To this end, 744 Nellore females, lactating and non…
View article: Taxa de prenhez em receptoras bovinas com diferentes graus de assincronia embrião-útero
Taxa de prenhez em receptoras bovinas com diferentes graus de assincronia embrião-útero Open
The objective of this study was to evaluate the effect of the degree of embryo-uterine asynchrony on the pregnancy rate of recipients after transfer of in vitro-produced bovine embryos. Data from 335 crossbred recipient heifers provided by…
View article: Aspectos da dinâmica folicular em bovinos
Aspectos da dinâmica folicular em bovinos Open
Durante as últimas décadas, a produtividade dos rebanhos bovinos tem aumentado significativamente, e isso tem sido atribuído principalmente à intensa seleção de características produtivas, tais como maior produção de carne e leite, através…
View article: Efficacy of different drugs on ovulation induction of dairy cows submitted to timed artificial insemination
Efficacy of different drugs on ovulation induction of dairy cows submitted to timed artificial insemination Open
Among the main estradiol esters used in cattle timed artificial insemination (TAI) programs, estradiol benzoate (EB) and estradiol cypionate (EC) has been commonly used because they low cost. But the estradiol estres present differences re…
View article: Efeito do acasalamento entre a doadora e o touro (Holandês versus Gir) na produção in vitro de embriões bovinos
Efeito do acasalamento entre a doadora e o touro (Holandês versus Gir) na produção in vitro de embriões bovinos Open
O objetivo do presente estudo foi avaliar o efeito da raça da doadora de oócitos e a raça do touro (Holandês versus Gir) sobre os parâmetros de produção in vitro (PIV) de embriões bovinos comparando as médias de oócitos recuperados e aptos…