The aim of this study was to evaluated changes in endometrial vascularization area (EVA) between the left and right uterine horn: a) during the ovarian follicular growth in intact llamas, and b) after exogenous estradiol administration of estradiol benzoate in ovariectomized (OVX) llamas. In expe...
Silva Jiménez, Mauricio
,
Urra, Felipe
,
Ratto, Marcelo
,
[Uterine endometrial vascularization during ovarian follicular growth in llamas: The effect of estradiol plasma concentration]
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Uterine endometrial vascularization during ovarian follicular growth in llamas: The effect of estradiol plasma concentration
Ovulation-inducing factor (OIF) is a protein present in llama seminal plasma that has recently been identified as beta-Nerve Growth Factor (NGF) and it induces not only a high rate of ovulation but also appears to have luteotrophic properties in this species. A 2-by-2 experimental design was used...
Silva Jiménez, Mauricio
,
Ulloa Leal, C.
,
Norambuena, C.
,
Fernandez, A.
,
Adams, G. P.
,
Ratto, Marcelo
,
[Ovulation-inducing factor (OIF/NGF) from seminal plasma origin enhances Corpus Luteum function in llamas regardless the preovulatory follicle diameter]
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Ovulation-inducing factor (OIF/NGF) from seminal plasma origin enhances Corpus Luteum function in llamas regardless the preovulatory follicle diameter
The objective of the study was to compare the pituitary and ovarian responses after intramuscular, intravenous, or intrauterine administration of P-nerve growth factor (beta-NGF) of seminal plasma origin (SP-NGF) in llamas. In experiment 1, mature female llamas with a growing follicle of 7 mm or ...
Silva Jiménez, Mauricio
,
Fernandez, A.
,
Ulloa Leal, C.
,
Adams, G. P.
,
Berland Olea, Marco
,
Ratto, Marcelo
,
[LH release and ovulatory response after intramuscular, intravenous, and intrauterine administration of beta-nerve growth factor of seminal plasma origin in female llamas]
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LH release and ovulatory response after intramuscular, intravenous, and intrauterine administration of beta-nerve growth factor of seminal plasma origin in female llamas
Ruiz, J.
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Landeo, L.
,
Mendoza, J.
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Artica, M.
,
Correa, J. E.
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Silva Jiménez, Mauricio
,
Miragaya, M.
,
Ratto, Marcelo
,
[Vitrification of in vitro mature alpaca oocyte: Effect of ethylene glycol concentration and time of exposure in the equilibration and vitrification solutions]
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Vitrification of in vitro mature alpaca oocyte: Effect of ethylene glycol concentration and time of exposure in the equilibration and vitrification solutions
Contents The aim of this study was to compare the effect of the intramuscular administration of 50g of gonadorelin acetate versus natural mating, intrauterine infusion (i.u.) of a physiological relevant dose of either raw llama seminal plasma (SP) or purified beta-nerve growth factor from seminal...
Silva Jiménez, Mauricio
,
Urra, F.
,
Ulloa-Leal, C.
,
Ratto, Marcelo
,
[A comparative study of the effects of intramuscular administration of gonadorelin, mating and intrauterine infusion of either raw seminal plasma or seminal plasma purified -NGF on luteal development in llamas]
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A comparative study of the effects of intramuscular administration of gonadorelin, mating and intrauterine infusion of either raw seminal plasma or seminal plasma purified -NGF on luteal development in llamas
The objectives of this study were (1) to determine the effect of rabbit seminal plasma on LH secretion and ovulation using the llama animal model as an in vivo ovulation bioassay and (2) to determine the effect of llama or rabbit seminal plasma on ovulation induction in the rabbit model. In Exper...
Silva Jiménez, Mauricio
,
Nino, A.
,
Guerra, M.
,
Letelier, C.
,
Valderrama, X. P.
,
Adams, G. P.
,
Ratto, Marcelo
,
[Is an ovulation-inducing factor (OIF) present in the seminal plasma of rabbits?]
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Is an ovulation-inducing factor (OIF) present in the seminal plasma of rabbits?
This study was conducted to determine the use of repeated transvaginal ultrasound-guided cumulus oocyte complex (COC) aspiration on COC recovery rate, in vitro embryo production (IVP) and subsequent pregnancy rates in Holstein Friesian (HF) and Aberdeen Angus (AA) cows (Experiment 1), and in preg...
Ratto, Marcelo
,
Peralta, O. A.
,
Mogollon, G.
,
Strobel, P.
,
Correa, J.
,
[Transvaginal ultrasound-guided cumulus oocyte complexes aspiration and in vitro embryo production in suckled beef and lactating dairy cattle on pasture-based management conditions]
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Transvaginal ultrasound-guided cumulus oocyte complexes aspiration and in vitro embryo production in suckled beef and lactating dairy cattle on pasture-based management conditions
The objective of the present study was to compare the ovarian follicular response, cumulus-oocyte complex (COL) collection rate, and maturational status of COC collected from alpacas subsequent to treatment with two different superstimulatory protocols. Alpacas (n=7 per group) were treated with: ...
Ratto, Marcelo
,
Gomez, Constanza
,
Berland Olea, Marco
,
Adams, Gregg P.
,
[Effect of ovarian superstimulation on COC collection and maturation in alpacas]
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Effect of ovarian superstimulation on COC collection and maturation in alpacas
The objective was to determine the effect of energy diet restriction on energy balance, systemic leptin and corpus luteum (CL) vascularization, development, and function in South American camelids. In experiment 1, adult llamas were randomly assigned to receive a diet of 70% of their maintenance ...
Norambuena Ardiles, María
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Hernandez, Francisca
,
Alfaro, Jorge
,
Silva, Gonzalo
,
Topp, Shirley
,
Ratto, Marcelo
,
[Effect of Different Levels of Energy Diet Restriction on Energy Balance, Leptin and CL Development, Vascularization, and Function in South American Camelids]
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Effect of Different Levels of Energy Diet Restriction on Energy Balance, Leptin and CL Development, Vascularization, and Function in South American Camelids
Gonadotrophin releasing hormone (GnRH) is commonly used in llamas to induce ovulation; however, the consequence of reduced doses of GnRH on luteinizing hormone (LH) release, ovulatory response, and subsequent corpus luteum (CL) development and function have apparently not been investigated. Hence...
Silva Jiménez, Mauricio
,
Colazo, M. G.
,
Ratto, Marcelo
,
[GnRH dose reduction decreases pituitary LH release and ovulatory response but does not affect corpus luteum (CL) development and function in llamas]
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GnRH dose reduction decreases pituitary LH release and ovulatory response but does not affect corpus luteum (CL) development and function in llamas