Search Results - "Parraguez, VH"

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…”
Get full text

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…”
Get full text

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…”
Get full text

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:…”
Get full text

Effect of hypobaric hypoxia on lamb intrauterine growth: comparison between high- and low-altitude native ewes by Parraguez, V Ctor H, Atlagich, Miljenko, Díaz, Rodrigo, Bruzzone, María E, Behn, Claus, Raggi, Luis A

“…The present studies assessed the effect of hypobaric hypoxia on fetal lamb growth in high-altitude (HA) and low-altitude (LA) native ewes. Growth patterns of…”
Get more information

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…”
Get more information

Perinatal neuroendocrine regulation. Development of the circadian time-keeping system by Serón-Ferré, Marı́a, Torres, Claudia, Parraguez, Victor Hugo, Vergara, Marcela, Valladares, Luis, Forcelledo, Marı́a Luisa, Constandil, Luis, Valenzuela, Guillermo J

“…During gestation, the perinatal neuroendocrine axis keeps clock time. In primates, the suprachiasmatic nucleus (biological clock in mammals), shows oscillatory…”
Get full text

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…”
Get full text

Prediction of gestational age by ultrasonic fetometry in llamas ( Lama glama) and alpacas ( Lama pacos) by Gazitúa, Francisca J., Corradini, Paulina, Ferrando, Germán, Raggi, Luis A., Parraguez, Vı́ctor H.

“…Fetal biparietal diameter (BPD) and thorax height (TH) were measured by ultrasound during intrauterine growth in pregnant llamas ( Lama glama) and alpacas (…”
Get full text

Effect of constant light on fetal and maternal prolactin rhythms in sheep by Parraguez, V H, Valenzuela, G J, Vergara, M, Ducsay, C A, Yellon, S M, Serón-Ferré, M

“…A 24-h rhythm of plasma PRL is present in fetal sheep. This rhythm is synchronized to an environmental clue (zeitgeber). We determined whether the light-dark…”
Get full text

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…”
Get full text

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…”
Get more information

Early pregnancy diagnosis in alpaca ( Lama pacos) and llama ( Lama glama) by ultrasound by Parraguez, Víctor H., Cortéz, Sandra, Gazitúa, Francisca J., Ferrando, Germán, MacNiven, Verónica, Raggi, Luis A.

“…An ultrasonography study of early pregnancy diagnosis was carried out in 19 alpacas and 12 llamas, after controlled matings. The aim was to determine the…”
Get full text

Plasma progesterone in alpaca ( Lama pacos) during pregnancy, parturition and early postpartum by Raggi, Luis A., Ferrando, Germán, Parraguez, Victor H., MacNiven, Verónica, Urquieta, Bessie

“…Plasma progesterone concentration during pregnancy and the early postpartum period was measured by radioimmunoassay in five alpacas ( Lama pacos), of the…”
Get full text

Diurnal changes in light intensity inside the pregnant uterus in sheep by Parraguez, Vı́ctor H., Sales, Francisco, Valenzuela, Guillermo J., Vergara, Marcela, Catalán, Luis, Serón-Ferré, Marı́a

“…Penetration of light into the pregnant sheep uterus was studied in 9 ewes, gestational ages 40 to 142 days (term 147 days). Light sensors were placed inside…”
Get full text

NEUROPEPTIDH Y (NPY) PARTICIPATES IN THE CARDIOVASCU- LAR REGULATION IN THE NEWBORN LAMB by Carrasco, J, Sanhueza, E, Gaete, C, Riquelme, R, Parraguez, Vh, Daniels, A, Llanos, Aj

Get full text

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…”
Get full text

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…”
Get more information

Fetal prolactin levels respond to a maternal melatonin implant by Serón-Ferré, M, Vergara, M, Parraguez, V H, Riquelme, R, Llanos, A J

“…Seasonal PRL changes in adult sheep are controlled by photoperiod. The ability to detect photoperiod is mediated by the pineal gland through melatonin…”
Get more information

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…”
Get more information