Utiização de altrenogest injetável par o estabelecimento e manutençao da gestação em éguas receptoras de embriões acíclicas

• Ano de defesa: 2014
• Autor(a) principal: Aristizábal, Viviana Helena Vallejo [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Progesterona; Estrogênios; Egua - Reprodução; Medicamentos - Administração; Reprodução animal; Injeções; Estrogen; Reproduction
• Link de acesso: http://hdl.handle.net/11449/123777

In equine embryo transfer (ET) programs, the use of non-cyclic mares as embryo recipients by the administration of hormonal protocols, using exogenous estrogens and progestagens, has made the technique become more productive, increasing the number of available recipients and pregnancy rates throughout the year and reducing the issues caused by the photoperiod. The administration of both estrogens and progestagens in non-cyclic recipients is based on several studies conducted in the last three decades, in which the authors attempted to simulate the physiologic environment of the endometrium of pregnant mares, as the uterine edema induced by estrogens, that also stimulates the expression of endometrial estrogen and progesterone receptors; and the increase of uterine tone and histotrophic secretion stimulated by progestagens. The present study aimed to evaluate and compare the pregnancy rates in non-cyclic recipient mares, treated with injectable altrenogest, and in non-treated cyclic recipient mares until 90 days of gestation, correlating the findings with the supplementary corpora lutea formation and evaluating the expansion of the embryonic vesicle