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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.

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Pituitary receptors for GnRH and aneztro, and pituitary content of gonadotropins in beef cows. With this purpose a group of 89 dairy aenstro in anoestrus, with 60 or more days em calving, were selected in the south region of Chile.

Mammary somatosensory pathways are not required for suckling-mediated inhibition of luteinizing hormone secretion and delay of ovulation in cows. Expression of leptin receptor isoforms in rat brain microvessels.

How to cite this article. Embrapa Clima Temperado, In academic literature, it is debated whether ovarian follicular cysts OFC in dairy cows should be considered pathological or innocuous Vanholder et al Induction of ovulation in postpartum suckled beff cows. Leptin rapidly inhibits hypothalamic neuropeptide Y secretion and stimulates corticotropin-releasing hormone secretion in adrenalectomized mice. Domest Anim Endocrinol ; 5: Amino acid neurotransmitter release in the preoptic area of rats during the positive feedback actions of estradiol on LH release.


Synchronization of estrus in suckled postpartum beef cows with melengestrol acetate, 48 hour calf removal and PGF2a.

Revista Brasileira de Zootecniav. No warranty is given about the accuracy of the copy. Biochemical Journalv. Effects of estradiol on immediate early gene expression associated with ovulation in lactating rats: Is there an FSH-releasing factor?

Revista MVZ Córdoba

Ovarian follicular cysts in dairy cows: Review of cattle reproduction in the tropics. Biochemical and Biophysical Research Communicationsv. Postpartum vacws in suckled beff cows.

Regional differences in the distribution of gonadotropin-releasing hormone cells between rapidly growing and growth-restricted prepubertal female sheep. J Endocrinol ; 2: Estrus detection was carried out visually for periods of two hours in the morning and two in the afternoon.

Bovine C-terminal octapeptide of RFamide-related peptide-3 suppresses luteinizing hormone LH secretion from the pituitary as well as pulsatile LH secretion in bovines. Identification and characterization of a gonadotropin-inhibitory system in the brains of mammals.

This difference may be related to increased milk production in multiparous versus primiparous cows, as cows with higher milk production have an increased incidence of OFC Lopez-Gatius et alFitzgerald et al J Reprod Fert ; 30 Supp: Ovarian steroid regulation of estrogen and progesterone receptor messenger ribonucleic acid in the anteroventral periventricular nucleus of the rat.

An update on cystic ovarian degeneration in cattle. Yavas Y, Walton JS. Differences in gonadotrophin secretion post partum between Zebu and European breed cattle.

Stimulation of gonadotropin-releasing hormone surges by estrogen. Kisspeptin immunoreactive cells of the ovine preoptic area and arcuate nucleus cacas estrogen receptor alpha. Cows that did not have an insemination record 70 days postpartum were examined rectally, in order to diagnose and apply the corresponding treatment. Domestic Animal Endocrinologyv. The criteria used for the diagnosis of OFC were: Concentrations of progesterone and oxytocin receptors in endometrium of postpartum cows expected o have a short or normal oestrus cycle.


Effect of steroids and 48 hr calf removal on serum luteinizing hormone concentrations in anestrous beef cows. Ovarian follicular growth and development in mammals.

GnRH control during bovine postpartum anestrous

J Anim Sci ; Services on Demand Journal. A relationship vacss postpartum disease and the incidence of OFC was observed table 1as cows with pathological puerperium had a higher Odds ratio 1. Incidence of ovarian follicular cysts and their effect anesyro reproductive performance in dairy cows: This abstract may be abridged.

Brazilian Journal of Medical and Biological Researchv. Energy balance, first ovulation and the effects of naloxone on LH secretion in early postpartum dairy cows. Anim Breed Abstr ; S 98 Kiracofe GH.

Twice daily suckling but not milking with calf presence prolongs postpartum anovulation.