ANESTRO EN VACAS PDF

English: The aim of the present study was to induce oestrus in postpartum anoestrus dairy cows after the application of two hormonal treatments. With this. Controle sobre GnRH durante o anestro pós-parto em bovinos A secreção do hormônio folículo estimulante (FSH) em vacas retorna aos padrões do ciclo. 18 jun. O seu uso é recomendado para melhorias na fixação e taxas de concepção de vacas em anestro pós-parto, face auxiliar na sincronia do estro.

Author: Zulkigami Kajisho
Country: Indonesia
Language: English (Spanish)
Genre: Medical
Published (Last): 25 April 2004
Pages: 39
PDF File Size: 2.3 Mb
ePub File Size: 18.28 Mb
ISBN: 824-8-55771-412-8
Downloads: 99427
Price: Free* [*Free Regsitration Required]
Uploader: Gasar

Pituitary anestri for GnRH and estradiol and pituitary content of gonadotropins in beef cows. Positional cloning of the mouse obese gene and its human homologue.

This abstract may be abridged. Kisspeptin cells in the ewe brain respond to leptin and communicate with neuropeptide Y and proopiomelanocortin cells.

Estrus detection was carried out visually for periods of two hours in the morning and two in the afternoon. Ej Animal Behaviour Sciencev. Adipose obese gene product, leptin, inhibits bovine ovarian thecal cell steroidogenesis.

GnRH control during bovine postpartum anestrous

I Changes during the estrous cycle. O que corrobora com os resultados aqui apresentados. Influence of body condition at calving and postpartum nutrition on endocrine function and reproductive performance of primiparous beef cows.

  ERICH BLECHSCHMIDT PDF

Molecular and Cellular Endocrinologyv. Pituitary receptors for GnRH and estradiol, and pituitary content of gonadotropins in beef cows. Trends in Endocrinology and Metabolismv. Vaacas influence of progesterone during early pregnancy in cattle.

J Dairy Sci ; Groups 1 and 2 received an intravaginal device with 1. Instrucciones a los autores.

Regulation of luteinizing hormone-releasing hormone and luteinizing hormone secretion by hypothalamic amino vacaas. A Kaplan-Meier survival analysis was used to compare the proportion of non-pregnant cows and days postpartum in cows with and without OFC.

Ovarian function in suckling and non-suckling beef cows post partum. Palabras clave Nutrition; suckling; folicullar growth; ovulation; ciclicity. A case study in Mexico. Role of hypothalamic progesterone receptors.

Biochemical Journalv. Moreover, OFC are dynamic structures that may undergo regression and be replaced by new follicles, which later become OFC Hamilton et al Biology of Reproductionv. Identification and characterization of a gonadotropin-inhibitory system in the brains of mammals.

Ovarian follicular cysts in dairy cattle cause economic losses as a result of extension of the open period, cost of treatment, and risk of elimination of cows from the herd.

The relationship between uterine pathologies and the pathogenesis of ovarian cysts is unknown; nonetheless, negative effects of endometritis on follicular development, particularly on steroidogenesis, have been demonstrated Sheldon et al Leptin gene expression, circulating leptin, and luteinizing hormone pulsatility are acutely responsive to short-term fasting in prepubertal heifers: Domest Anim Endocrinol ; 7: Segundo DAS et al.

  ANTHONY DE JASAY THE STATE PDF

O tratamento 1 com 55 vacas e o tratamento 2 com 99 vacas. Endocrinology ; 6: Hormonal alterations in the lactating dairy cow in response to thermal stress. Pituitary and ovarian responses to gonadotropin releasing hormone, calf removal and progestogen in anestrous beef cows. Distribution of a novel avian gonadotropin-inhibitory hormone in the quail brain. The herd studied has 1, dairy cows in production, in confined housing, milked twice daily, and with an average production per lactation cycle of 11, kg of milk.

Leptin rapidly inhibits hypothalamic neuropeptide Y secretion and stimulates corticotropin-releasing hormone secretion in adrenalectomized mice. However, dairy cows that currently develop OFC only present anestrus PeterVanholder et al Acta Physiologica Scandinavicav.

Revista MVZ Córdoba

Journal of Animal Sciencev. This review covers the influence of nutrition and suckling with emphasis on GnRH regulation, and provides up to date concepts of neuroendocrine control of GnRH secretion during postpartum in cattle.

Se revisaron los registros reproductivos de 1.