Ovarian Cyclicity
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Ovarian blood vessel occlusion as a surgical sterilization method in rats
PURPOSE: To evaluate the female sterilization by occlusion of the ovarian blood flow, using the rat as experimental model.METHODS: Fifty-five females rats were divided into four groups: I (n=10), bilateral ovariectomy, euthanized at 60 or 90 days; II (n=5), opening the abdominal cavity, euthanized at 90 days; III (n=20), bilateral occlusion of the ovarian bl
Acta Cir. Bras.. Publicado em: 2014-04
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2. Inseminação artificial em tempo fixo em primíparas nelore lactantes acíclicas / Fixed Time Artificial Insemination in Lactating Primiparous Acyclic Nelore Cows
The objective of this experiment was to evaluate the efficiency of a Fixed Time Artificial Insemination (TAI) protocol in an attempt to improve the reproductive performance of primiparous lactating acyclic Nelore cows. The experiment was conducted for a period of breeding season (BS) of 180 days. Were used 350 Nelore cows with body condition score (BCS) grea
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/06/2011
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3. Long-term melatonin treatment reduces ovarian mass and enhances tissue antioxidant defenses during ovulation in the rat
Melatonin regulates the reproductive cycle, energy metabolism and may also act as a potential antioxidant indoleamine. The present study was undertaken to investigate whether long-term melatonin treatment can induce reproductive alterations and if it can protect ovarian tissue against lipid peroxidation during ovulation. Twenty-four adult female Wistar rats,
Braz J Med Biol Res. Publicado em: 2011-03
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4. Consumo e custo da alimentacao para recuperacao da atividade ovariana luteal ciclica de vacas mesticas leiteiras com anestro.
O objetivo do trabalho foi verificar o consumo e o custo de alimentos para recuperacao da atividade ovariana luteal ciclica (AOLC) em vacas mesticas Holandes x zebu com anestro. Foram usadas 18 vacas, nao gestantes, nao lactantes, magras, apresentando ovarios sem funcao luteal, de tamanho normal e sem foliculos palpaveis na superficie. Doze animais permanece
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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5. Analytical profile of progestins during puberty and ovarian cyclicity in jaguar (Panthera onca); gestation and lactation in jaguarondi (Puma yagouaroundi) / Perfil analítico das progestinas fecais nas fases de puberdade e ciclicidade ovariana em Onça Pintada (Panthera onca); gestação e lactação em Gato Mourisco (Puma yagouaroundi)
O presente estudo teve como objetivo utilizar a técnica de enzimaimunoensaio (EIE) com o Ac monoclonal CL425 na dosagem de metabólitos de progestinas fecais para caracterizar o perfil no início da atividade ovariana e durante o ciclo estral em onça pintada (Panthera onca) e durante a gestação e lactação em gato mourisco (Puma yagouaroundi). Foram est
Publicado em: 2008
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6. Combined effects of gonadotropin and flushing in pubertal gilts / Estudo dos efeitos combinados de gonadotrofinas e flushing em marrãs à puberdade
The objective of this study, held at the Swine Research Laboratory of the School of Veterinary Medicine and Zootechnology of the Univ. of São Paulo in Pirassununga, São Paulo, was to verify the combined effects of exogenic gonadotropin (eCG and LH) and flushing on the duration and dispersion of the manifestation of initial and second estruses, cyclicity of
Publicado em: 2003
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7. Comparative study of ovarian follicular dynamics and plasma concentrations of FSH and LH in lactating and non-lactating mares / Estudo comparativo da dinâmica folicular ovariana e concentrações plasmáticas de FSH e LH em éguas lactantes e não-lactantes
The objective of the present study was to evaluate the folliculogenesis in lactating mares and to compare the follicular dynamics and the FSH (follicle stimulating hormone) and LH (luteinizing hormone) profiles of lactating and non-lactating mares. In addition, the effects of season and body condition, as well as changes in the uterine echotexture and corpus
Publicado em: 2003
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8. Restoration of ovulatory cycles by young ovarian grafts in aging mice: potentiation by long-term ovariectomy decreases with age.
The relative contributions of ovarian and hypothalamic-pituitary factors to the anovulatory status of aging mice were evaluated by measuring the capacity of mice to resume ovulatory cyclicity after receiving young ovaries under the renal capsule. Young grafts partially restored cyclicity if old hosts were acutely ovariectomized but almost fully restored cycl
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9. Phosphodiesterase 3 inhibitors suppress oocyte maturation and consequent pregnancy without affecting ovulation and cyclicity in rodents.
During each reproductive cycle, a preovulatory surge of gonadotropins induces meiotic maturation of the oocyte in the preovulatory follicle followed by ovulation. Although gonadotropins stimulate cAMP production in somatic cells of the follicle, a decrease in intra-oocyte cAMP levels is required for resumption of meiosis in oocytes. Based on the observed com
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10. Ovarian fusion in sheep.
A survey of ovine reproductive tracts was undertaken in 2 abattoirs in the south west of England, in which 23,536 tracts from nulliparous animals and 9970 tracts from cull ewes were examined. The ovaries were fused in 15 nulliparous animals. In 13 of these animals, 2 ovarian structures could be separately identified macroscopically, whilst in the 2 other ani
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11. Role of Estradiol in Cortisol-Induced Reduction of Luteinizing Hormone Pulse Frequency
Precise control of pulsatile GnRH and LH release is imperative to ovarian cyclicity but is vulnerable to environmental perturbations, like stress. In sheep, a sustained (29 h) increase in plasma cortisol to a level observed during stress profoundly reduces GnRH pulse frequency in ovariectomized ewes treated with ovarian steroids, whereas shorter infusion (6
The Endocrine Society.
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12. A Rat Model of Epilepsy in Women: A Tool to Study Physiological Interactions between Endocrine Systems and Seizures
Epilepsy in women is influenced by endocrine status and antiepileptic drugs, but without an animal model, the effects of endocrine variables and antiepileptic drugs cannot be easily dissociated from the influence of epilepsy itself. Animal models have had limited utility because experimentally induced seizures typically result in reproductive failure. This s
The Endocrine Society.