Search Results - "Parraguez, V. H."

Post‐coital administration of levonorgestrel does not interfere with post‐fertilization events in the new‐world monkey Cebus apella by Ortiz, M.E., Ortiz, R.E., Fuentes, M.A., Parraguez, V.H., Croxatto, H.B.

“…BACKGROUND: Experimental evidence to disprove the belief that emergency contraception with levonorgestrel (LNG) prevents pregnancy by interfering with…”
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Fertility of a High‐Altitude Sheep Model is Compromised by Deficiencies in Both Preovulatory Follicle Development and Plasma LH Availability by Parraguez, VH, Diaz, F, Cofré, E, Urquieta, B, De Los Reyes, M, Astiz, S, Gonzalez‐Bulnes, A

“…At high altitude, hypoxia and/or oxidative stress may compromise fertility. This study tested the relative effect of short‐ or long‐term exposure to…”
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Sperm Nuclear Decondensation Induction Capacity of In Vitro and In Vivo Matured Canine Oocytes by De los Reyes, M, Palomino, J, Parraguez, VH, Vergara, J

“…Contents The objectives of this study were to evaluate the sperm nuclear decondensation capacity of ovulated and in vitro‐matured (IVM) canine oocytes during…”
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hCG-Induced Ovulation in Thoroughbred Mares Does Not Affect Corpus luteum Development and Function During Early Pregnancy by Urquieta, B, Durán, MC, Coloma, I, Parraguez, VH

“…Our aim was to compare Corpus luteum (CL) development and blood plasma concentration of progesterone ([P₄]) in thoroughbred mares after spontaneous (Control:…”
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Cyclooxygenase 2 messenger RNA levels in canine follicular cells: interrelationship with GDF-9, BMP-15, and progesterone by De Los Reyes, M., Palomino, J., Araujo, A., Flores, J., Ramirez, G., Parraguez, V.H., Aspee, K.

“…Cyclooxygenase 2 (COX-2) encoded by the Cox-2 gene within the periovulatory follicles is a critical mediator of oocyte development. Growth differentiation…”
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The impact of prenatal environment on postnatal life and performance: Future perspectives for prevention and treatment by Gonzalez-Bulnes, A., Parraguez, V.H., Berlinguer, F., Barbero, A., Garcia-Contreras, C., Lopez-Tello, J., Pesantez-Pacheco, J.L., Martinez-Ros, P.

“…The present review aims to offer a non-comprehensive outline of the current state-of-the-art and future perspectives on management and therapeutic tools for…”
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Cytologic, hormonal, and ultrasonographic correlates of the menstrual cycle of the New World monkey Cebus apella by Ortiz, R.E., Ortiz, A.C., Gajardo, G., Zepeda, A.J., Parraguez, V.H., Ortiz, M.E., Croxatto, H.B.

“…Few reports on the reproductive physiology of Cebus apella have been published. In this study we characterized menstrual cycle events by means of vaginal…”
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Ram semen deterioration by short-term exposure to high altitude is prevented by improvement of antioxidant status by Cofré, E., Peralta, O. A., Raggi, A., De los Reyes, M., Sales, F., González-Bulnes, A., Parraguez, V. H.

“…Ovine reproduction efficiency in herds at high altitude (ha) is lower than that at low altitude (la). In ewes, ha effects are due to hypoxia and oxidative…”
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Mitochondrial distribution and meiotic progression in canine oocytes during in vivo and in vitro maturation by Reyes, M. De los, Palomino, J., Parraguez, V.H., Hidalgo, M., Saffie, P.

“…The objective was to evaluate mitochondrial distribution, and its relationship to meiotic development, in canine oocytes during in vitro maturation (IVM) at…”
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In vitro fertilization and development of cumulus oocytes complexes collected by ultrasound-guided follicle aspiration in superstimulated llamas by Berland, M.A., von Baer, A., Ruiz, J., Parraguez, V.H., Morales, P., Adams, G.P., Ratto, M.H.

“…The objective was to evaluate the developmental competence of cumulus-oocyte complexes (COC) collected by follicular aspiration in llamas treated with FSH or…”
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Prenatal development of the retinohypothalamic pathway and the suprachiasmatic nucleus in the sheep by Torrealba, F, Parraguez, V H, Reyes, T, Valenzuela, G, Serón-Ferré, M

“…Circadian rhythms are present during fetal life in several mammalian species. To characterize the ontogeny of the neural mechanisms that account for circadian…”
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Effect of phototherapy on the plasma bilirubin concentration of newborn foals by Durán, M. C., Ramírez, A. M., Parraguez, V. H., Ramírez, H.

“…FIG 1 (a) Location of the phototherapy corral within the stall, (b) a foal inside the phototherapy corral, and (c) a foal returning to the phototherapy corral…”
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Day-night changes in c-fos expression in the fetal sheep suprachiasmatic nucleus at late gestation by Constandil, L, Parraguez, V H, Torrealba, F, Valenzuela, G, Serón-Ferré, M

“…The suprachiasmatic nucleus (SCN) is a circadian oscillator in mammals and shows day-night changes in metabolic activity. To investigate whether the fetal…”
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Study of prenatal growth in the capuchin monkey (Cebus apella) by ultrasound by Corradini, P., Recabarren, M., Serón-Ferré, M., Parraguez, V.H.

“…: Capuchin monkey (Cebus apella) is a new world primate that in recent years has become important in biomedical research. The purpose of this study was to…”
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Ontogeny of the circadian rhythm of cortisol in sheep by V H Parraguez, M Vergara, R Riquelme, R Raimann, A J Llanos, M Serón-FerrÃ

“…In this work we investigated the ontogeny of the rhythm of plasma cortisol in sheep. Plasma cortisol was measured by radioimmunoassay in blood samples obtained…”
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Fetal brown fat deposition is increased by melatonin implants in sheep by Sales, F, Parraguez, V H, McCoard, S, Cofré, E, Peralta, O A, Subiabre, I

“…The major cause of lamb mortality in grazing systems at birth is starvation and/or exposure to cold complex, with hypothermia being a primary contributing…”
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308 Fetal brown fat deposition is increased by melatonin implants in sheep by Sales, F., Parraguez, V. H., McCoard, S., Cofré, E., Peralta, O. A., Subiabre, I.

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The circadian variation of prolactin in fetal sheep is affected by the seasons by Serón-Ferré, M, Vergara, M, Parraguez, V H, Riquelme, R, Llanos, A J

“…Plasma PRL concentration shows a circadian variation in fetal and adult sheep. In the adult sheep the presence of this variation depends on the season. In this…”
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The retino-hypothalamic tract is involved in prolactin regulation in fetal sheep by Vergara, M, Parraguez, V H, Recabarren, S, Riquelme, R, Garay, F, Valenzuela, G, Serón-Ferré, M

“…To investigate the role of the retino-hypothalamic tract on fetal prolactin regulation, we examined the effect of ocular enucleation on fetal plasma prolactin…”
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Effect of a melatonin implant on the circadian variation of plasma prolactin and rectal temperature in newborn sheep by Parraguez, V H, Vergara, M, Holmgren, N, Cardinali, D P, Riquelme, R, Llanos, A J, Serón-Ferré, M

“…Plasma prolactin and rectal temperature show a circadian rhythm in newborn sheep raised under continuous light. Melatonin lowers the concentration of plasma…”
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