Luteolysis
Mostrando 1-12 de 30 artigos, teses e dissertações.
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1. Inflammation: friend or foe of bovine reproduction?
Abstract Inflammation is not only the first line of defense of the organism but is also required in many reproductive processes such as ovulation, corpus luteum development, luteolysis, uterine clearance after insemination and post partum. Nevertheless, if excessive or persistent, inflammation can switch from a positive mechanism to a deleterious process, im
Anim. Reprod.. Publicado em: 28/11/2019
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2. Transforming growth factor-beta family members are regulated during induced luteolysis in cattle
Abstract The transforming growth factors beta (TGFβ) are local factors produced by ovarian cells which, after binding to their receptors, regulate follicular deviation and ovulation. However, their regulation and function during corpus luteum (CL) regression has been poorly investigated. The present study evaluated the mRNA regulation of some TGFβ family l
Anim. Reprod.. Publicado em: 25/11/2019
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3. ROTA DE AÇÃO DA PROSTAGLANDINA F2 ADMINISTRADA VIA SUBMUCOSA VULVAR NA LUTEÓLISE DE BOVINOS / ROUTE OF ACTION OF PROSTAGLANDIN F2 AFTER INTRAVULVOSUBMUCOUS INJECTION IN BOVINE LUTEOLYSIS
The aim of this study was to verify if prostaglandin F2 (PGF2) administered by intravulvosubmucous (IVSM) injection induces luteolysis by reaching the corpus luteum (CL) directly by a local absorption rote, preventing its metabolism in the lungs, or after absorption and distribution via the systemic circulation. In a first trial, the estrus rate of 1,937 bee
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/09/2011
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4. Assessment of luteal function in goats by ultrasonographic image attribute analysis.
The aim of this study was to evaluate the potential of luteal echotexture (mean pixel value and heterogeneity), as a tool for assessing luteal function during different phases of the estrous cycle in Toggenburg goats. Sonographic evaluations of the ovaries were performed daily in nulliparous goats (n = 21), using a 5MHz linear rectal probe, commencing at est
Small Ruminant Research. Publicado em: 2011
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5. Assessment of luteal function in goats by ultrasonographic image attribute analysis.
The aim of this study was to evaluate the potential of luteal echotexture (mean pixel value and heterogeneity), as a tool for assessing luteal function during different phases of the estrous cycle in Toggenburg goats. Sonographic evaluations of the ovaries were performed daily in nulliparous goats (n = 21), using a 5MHz linear rectal probe, commencing at est
Small Ruminant Research. Publicado em: 2011
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6. Manipulation of ovarian and uterine function to increase conception rates in cattle.
In cattle, embryonic and fetal losses are the major causes of reproductive failureo Losses associated with failure in the process of maternal recognition of pregnancy can amount to as much as 30%0 Successful establishment of pregnancy depends on a delicate balance between luteolytic mechanisms inherent to the endometrium at the end of diestrus and antiluteol
Animal Reproduction. Publicado em: 2011
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7. Indução de codominância e dupla ovulação e novas abordagens em luteólise de bovinos / Induced codominance and double ovulation and new approaches on luteolysis in cattle
The day-4 ablation model for increasing the incidence of double ovulations in heifers was used for the chapters 2 and 3. In this regard, follicles ≥ 5 mm were ablated at 4 d post-ovulation to induce a prominent FSH surge and a new follicular wave, and two injections of prostaglandin F2α (12 h apart) were given two days later (6 d) to favor ovulati
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/02/2010
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8. Comportamento sexual de cabras Toggenburg durante a estação reprodutiva após luteólise natural ou induzida
Proestrus (days -2 and -1), estrus (days 1, 2 and 3) and metaestrus (days +1 and +2) sexual behavior was monitored in Toggenburg females goats, during natural breeding season after induced and natural luteolysis. The females received two doses of PGF2 10-day interval, for estrus synchronization. After the first injection the estrus was monitored three times
Publicado em: 2010
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9. Luteólise antecipada em protocolo de inseminação artificial a tempo fixo com progesterona em vacas nos pós-parto
O objetivo do trabalho foi verificar o efeito da antecipação de um luteolítico prévio a retirada do dispositivo intravaginal de progesterona (P4) sobre a taxa de prenhez na inseminação artificial em tempo fixo (IATF) de vacas com cria ao pé em comparação com protocolos de IATF tradicionais que utilizam o luteolítico na ocasião da retirada de P4. T
Publicado em: 2010
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10. EXPRESSÃO DAS MAPKs EM FOLÍCULOS OVARIANOS E CORPOS LUTEOS EM DIFERENTES FASES DO CICLO ESTRAL DE BOVINOS / EXPRESSION OF MAPKs IN ovarian follicles is Lutea at different stages of estrous cycle CATTLE
A ocorrência do ciclo estral bovino, a partir de variações dos hormônios do eixohipotálamo- hipófise-gônadas, ativa as vias das MAPKs (proteína ativada por mitógenos) O objetivo desta tese foi avaliar in vivo a freqüência de expressão da forma ativa (fosforilada), de todos os tipos foliculares ovarianos e corpo lúteo para p- MEK 1/2 e p-ERK1/2,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/08/2009
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11. EXPRESSÃO DAS MAPKs EM FOLÍCULOS OVARIANOS E CORPOS LUTEOS EM DIFERENTES FASES DO CICLO ESTRAL DE BOVINOS / EXPRESSION OF MAPKs IN ovarian follicles is Lutea at different stages of estrous cycle CATTLE
Bovine estrous cycle activates the pathways of MAPKs (mitogen activated protein) via oscillation of hypothalamus-pituitary-gonad axis hormones. The objective of this work was to evaluate in vivo the frequency of expression of active (phosphorylated) form, of p-MEK 1/2 and p-ERK1/2 in all types of ovarian follicles and corpora lutea in different phases of the
Publicado em: 2009
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12. Use of computer-assisted ultrasound image analysis to evaluate bovine luteal function / Uso da análise computacional de imagens ultra-sonográficas na avaliação da função luteal em bovinos
Ultrasound image attributes, quantified by computer-assisted analysis, are a good indication of corpora lutea (CL) physiological and functional status. However, a standard method to capture and processing images has not been established for bovine. The purposes of this research were to establish a methodology for capture, processing and computer-assisted ana
Publicado em: 2007