Ovulatory Activity
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Aspectos reproductivos de Dendropsophus sanborni (Anura, Hylidae) en el nordeste de la Argentina
Reproductive aspects of Dendropsophus sanborni (Anura, Hylidae) in northeastern Argentina. The aim of this investigation was to characterize reproductive aspects of Dendropsophus sanborni (Schmidt, 1944) (Anura, Hylidae) in the northwest of Corrientes province, in northeastern Argentina. The reproductive cycles of males and females, the existence of sexual d
Iheringia, Sér. Zool.. Publicado em: 2014-12
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2. Comparison between body condition scoring and subcutaneous fat thickness and its relation to reproductive efficiency in Mangalarga Marchador donor mares / ComparaÃÃo entre escore de condiÃÃo corporal e espessura de gordura subcutÃnea e sua relaÃÃo com a eficiÃncia reprodutiva de Ãguas doadoras Mangalarga Marchador
Body condition scoring (BCS) was compared to ultrasound subcutaneous fat thickness (SFT) determination and their relation to the reproductive efficiency of Mangalarga Marchador embryo donor mares. Fifty six barren mares were studied throughout the 2008/2009 breeding season (August through April). Body condition score, evaluated monthly, was obtained form the
Publicado em: 2009
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3. Atividade reprodutiva de Plagioscion squamosissimus (Heckel,1840) (Actinopterygii,Perciformes), no reservatório de Pedra, Rio de Contas, Bahia
We evaluated the reproductive aspects of the organization and characterization of oocytes and the maturational stages of Plagioscion squamosissimus in the reservoir of stone, river of Auditors, Bahia. The collections were bimonthly, conducted between november/04 and september/06. It was recorded during reproductive activity every year, with peaks in march/05
Publicado em: 2008
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4. Seasonal pattern of plasma progesterone, prolactine and melatonine concentrations in ewes kept at lower latitudes / Perfis sazonais das concentrações plasmáticas de progesterona, prolactina e melatonina de ovelhas criadas em baixas latitudes
This study evaluated the ovulatory activity throughout the year, plasma melatonin and prolactin concentrations on 24 hours during solstices and equinoces on wool (Romney Marsh - 10) and hair (Santa Inês - 10) ewes kept under natural photoperiod and lower latitudes in the southern hemisphere. To monitor the ovulatory activity, blood samples were collected we
Publicado em: 2006
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5. Is changing hypothalamic activity important for control of ovulation?
The activity of the hypothalamic gonadotrophin releasing hormone pulse generator in women with regular ovulatory and anovulatory menstrual cycles was assessed to see whether changes therein are important determinants of normal and impaired ovarian function. Endogenous gonadotrophin releasing hormone secretion was inferred by measurement of the pituitary lute
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6. Seasonal ovulatory activity exists in tropical Creole female goats and Black Belly ewes subjected to a temperate photoperiod
BioMed Central.
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7. Ovarian follicular activity and hormonal profile during estrous cycle in cows: the development of 2 versus 3 waves
Most estrous cycles in cows consist of 2 or 3 waves of follicular activity. Waves of ovarian follicular development comprise the growth of dominant follicles some of which become ovulatory and the others are anovulatory. Ovarian follicular activity in cows during estrous cycle was studied with a special reference to follicular waves and the circulating conce
BioMed Central.
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8. Circadian organization of the estrous cycle of the golden hamster.
In constant dim illumination the hamster estrous cycle free-runs with a period that is a quadruple multiple of the concurrently recorded rhythm of wheel-running activity; both activity and estrous cycles are generated by biological clocks. Maintenance of stable phase angle differences between heat onset and running onset before and after treatment with deute
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9. Inositol 1,4,5-Trisphosphate Signaling Regulates Rhythmic Contractile Activity of Myoepithelial Sheath Cells in Caenorhabditis elegans
Intercellular communication between germ cells and neighboring somatic cells is essential for reproduction. Caenorhabditis elegans oocytes are surrounded by and coupled via gap junctions to smooth muscle-like myoepithelial sheath cells. Rhythmic sheath cell contraction drives ovulation and is triggered by a factor secreted from oocytes undergoing meiotic mat
The American Society for Cell Biology.
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10. Gonadotropin stimulates ovarian renin-angiotensin system in the rabbit.
The present study was undertaken to assess the role of ovarian renin-angiotensin system (RAS) in the preovulatory cascade induced by gonadotropin exposure. In the in vitro perfused rabbit ovaries, exposure to human chorionic gonadotropin (hCG) enhanced the secretion rate of angiotensin II (Ang II) within 1 h. The secretion rate reached maximal levels at 6 h
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11. Runt-Related Transcription Factor 1 Regulates Luteinized Hormone-Induced Prostaglandin-Endoperoxide Synthase 2 Expression in Rat Periovulatory Granulosa Cells
Runt-related transcription factor 1 (RUNX1), a transcription factor, is transiently induced by the LH surge and regulates gene expression in periovulatory granulosa cells. Potential binding sites for RUNX are present in the 5′-flanking region of the Ptgs2 (prostaglandin-endoperoxide synthase 2) gene. Periovulatory Ptgs2 expression is essential for ovulatio
The Endocrine Society.
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12. Ovulation efficiency is reduced in mice that lack plasminogen activator gene function: functional redundancy among physiological plasminogen activators.
Several lines of indirect evidence suggest that plasminogen activation plays a crucial role in degradation of the follicular wall during ovulation. However, single-deficient mice lacking tissue-type plasminogen activator (tPA), urokinase-type plasminogen activator (uPA), or PA inhibitor type 1(PAI-1) gene function were recently found to have normal reproduct