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A new vision of the origin and the oocyte development in the Ostariophysi applied to Gymnotus sylvius (Teleostei: Gymnotiformes) Neotropical Ichthyology
França,Gisleine Fernanda; Grier,Harry J.; Quagio-Grassiotto,Irani.
Based on new knowledge coming from marine perciform species, the origin of oocytes and their development in the Ostariophysi, Gymnotus sylvius is described. In both Gymnotus sylvius and marine perciform fish, oogonia are found in the germinal epithelium that forms the surface of the ovarian lamellae. At the commencement of folliculogenesis, proliferation of oogonia and their entrance into meiosis gives rise to germ cell nests that extend into the stroma from the germinal epithelium. Both cell nests and the germinal epithelium are supported by the same basement membrane that separates them from the stroma. At the time of meiotic arrest, oocytes in a cell nest become separated one from the other as processes of prefollicle cells, these being derived from...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Folliculogenesis; Primary growth; Secondary growth; Maturation; Ovulation.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000400008
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Accumulation of Eosinophils in the Infundibulum of the Bovine Oviduct Just after Ovulation OAK
KOWSAR, Rasoul; JIEMTAWEEBOON, Sineenard; SHIRASUNA, Koumei; SHIMIZU, Takashi; SASAKI, Motoki; KITAMURA, Nobuo; MIYAMOTO, Akio; 清水, 隆; 佐々木, 基樹; 宮本, 明夫.
This study was to investigate the localization and distribution of eosinophils (EOS) in the bovine oviduct throughout the estrous cycle. Histological studies revealed more abundant EOS in the infundibula of the oviducts ipsilateral to the preovulatory dominant follicle and the ovulated ovary. The number of EOS was higher in the infundibula of the oviducts ipsilateral to the ovulated ovary than those of the oviducts contralateral to the ovulated ovary. The infundibula of the oviducts ipsilateral to the preovulatory dominant follicle had higher number of EOS than those of the oviducts ipsilateral to the mid-cycle corpus luteum. The number of EOS in the isthmus, but not in the ampulla, was higher in the outer layers (tunica muscularis and tunica serosa) than...
Palavras-chave: Bovine; Eosinophil; Oviduct; Ovulation.
Ano: 2014 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3947
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Although it induces synchronized ovulation, hCG reduces the fertility of Santa Ines ewes submitted to TAI Arq. Bras. Med. Vet. Zootec.
Dias,L.M.K.; Sales,J.N.S.; Viau,P.; Barros,M.B.P.; Nicolau,S.S.; Simões,L.M.S.; Alves,N.G.; Alonso,M.A.; Valentim,R.; Oliveira,C.A..
ABSTRACT The aim of this study was to evaluate hCG treatment on ovarian response and on pregnancy rate using a 9-day oestrus synchronization protocol in Santa Ines ewes. On a random oestrus cycle day, ewes received an intravaginal progesterone device (Primer-PR®, Tecnopec, Brazil). Nine days later (Day 9), 30µg of d-cloprostenol (Prolise®, Syntex, Argentina) and 250IU of eCG (Folligon®, Intervet, Brazil) were administered and the progesterone device was removed. This moment, the ewes were randomly assigned on two groups: Control Group and hCG Group. In the hCG Group, the ewes received 500IU of hCG (Vetecor®, Hertape-Calier, Spain) 24h after device removal. In the Control Group, the ewes did not receive any ovulation inductor. Control and hCG Groups ewes...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Progesterone; Follicle; Ovulation; Synchronization.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000100122
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Anthropogenic impacts on yellow-spotted river turtle Podocnemis unifilis (Reptilia: Podocnemididae) from the Brazilian Amazon. Repositório Alice
ARRAES, D. R. S.; CUNHA, H. F. A.; TAVARES-DIAS, M..
The purpuse of this study was to investigated the influence of anthropogenic impacts on Podocnemis unifilis nesting on a stretch from Falsino river, with two forest reserves, and one urban area on the Araguari river, state of Amapá, eastern Amazon (Brazil). A total of 180 nests were found, being 89.4 % in the forest reserves and only 10.6 % in urban areas. On Falsino river, we observed a spawning pattern, because the number of nests was correlated to the length and width of the nesting locations. On Araguari river, the P. unifilis nests were generally found in areas with surrounding vegetation up to 5 meters in height, minimum distance of 120 meters from residences and immediately or after places of higher exploration of pebbles. Females from Falsino river...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Tartaruga; Ovulação; Ninho; Turtle; Ovulation; Nests.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1049102
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Artificial insemination system without estrous observation in suckled beef cows Ciência Rural
Borges,Luiz Felipe Kruel; Ferreira,Rogério; Siqueira,Lucas Carvalho; Bohrer,Rodrigo Camponogara; Borstmann,Jacson William; Oliveira,João Francisco Coelho de; Gonçalves,Paulo Bayard Dias.
The aim was to develop a timed artificial insemination (TAI) system in suckled beef cows. Cows (n=227), 60-80 days postpartum, received estradiol benzoate (5mg) and a vaginal device containing 250µg of medroxyprogesterone acetate (MPA; day 0). On day six, cloprostenol (125µg) and eCG (400IU) were administrated and calves were weaned for 88h. The devices were removed on day seven (BioRep group) or on day eight (TAI group). All cows of TAI group and cows of BioRep group that did not exhibit standing estrus received GnRH (100µg) on day 9. In experiment I, the follicular growth was monitored daily by transrectal ultrasound exams, from day 6 to day 9. The average size of the dominant follicle on day nine was 11.1±0.99mm (BioRep, n=7) and 11.5±0.65mm (TAI, n=7)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Beef cows; Postpartum; TAI; MPA; Ovulation.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000200028
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Associação da citologia do muco cervical com parâmetros ovulatórios de ovelhas e cabras submetidas a indução de estro sincronizado. Repositório Alice
MACHADO, V. de O.; FONSECA, J. F. da.
A avaliação da citologia vaginal e do muco cervical em diferentes fases do ciclo estral levam a resultados satisfatórios na detecção do tempo da ovulação, como já relatado em cães e em caprinos, respectivamente. Objetivou-se nesse estudo avaliar o muco cervical e a citologia vaginal como ferramentas para prever o tempo de ovulação em ovelhas e cabras. É possível afirmar que tanto a citologia vaginal quanto a avaliação do muco cervical são estratégias menos precisas em ovinos, contudo, ambas foram eficientes para determinar o tempo de ovulação em cabras.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Citologia vaginal; Muco cervical; Ovino; Caprino; Inseminação Artificial; Ovulação; Goats; Sheep; Artificial insemination; Ovulation.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1116490
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Changes in the Messenger RNA Expressions of the Endothelin-1 and Angiotensin Systems in Mature Follicles of the Superovulated Bovine Ovary OAK
SHIMIZU, Takashi; BERISHA, Bajram; SCHAMS, Dieter; MIYAMOTO, Akio; 清水, 隆; 宮本, 明夫.
The aim of the present study was to examine the messenger RNA expressions of the endothelin and angiotensin systems during the periovulatory phase in gonadotrophin releasing hormone (GnRH)-treated cows. Ovaries were collected by transvaginal ovariectomy (n=5 cows/group), and the follicles (n=5, one follicle/cow) were classified into the following groups: before GnRH administration (control, before LH surge), 3-5 h after GnRH (during LH surge), 10 h after GnRH; 20 h after GnRH, 25 h after GnRH (peri-ovulation), and early corpus luteum (CL) (Days 2-3). Expression of mRNA was investigated using quantitative real-time PCR. The expression of angiotensin converting enzyme (ACE) mRNA significantly decreased immediately after onset of the LH surge and remained at...
Palavras-chave: Angiotensin; Bovine; Endothelin-1; Gonadotrophin releasing hormone (GnRH); Ovulation.
Ano: 2007 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2987
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Ciclicidade de cabras Saanen exploradas na região litorânea do estado do Ceará. Repositório Alice
LOPES JÚNIOR, E. S..
Resumo: A fim de observar o peso corporal e verificar a atividade estral de cabras Saanen, quando exploradas em região tropical, dez cabras Saanen com idade variando de 12 a 60 meses foram utilizadas. O comportamento de estro foi monitorado duas vezes ao dia, manhã e tarde, utilizando dois bodes vasectomizados. Os ciclos estrais foram quantificados e classificados como de curta (< 17 dias), normal (17-25 dias) ou longa (> 25 dias) duração. Durante todo o experimento, a cada sete dias, as fêmeas eram pesadas em uma balança digital apropriada para animais de médio porte. As durações dos ciclos (d) e dos estros (h), bem como o peso corporal (kg), foram analisados pelo procedimento do GLM para desenho fatorial. Diferenças entre pesos corporais foram...
Tipo: Tese/dissertação (ALICE) Palavras-chave: Raça Saanen; Fotoperíodo; Estacionalidade; Photoperiod; Sazonalidade; Estação de monta; Caprino; Ovulação; Reprodução animal; Raça Saanen; Ciclo estral; Comportamento sexual; Variação sazonal; Goats; Ewes; Animal reproduction; Oestrous cycle; Sexual behavior; Ovulation; Seasonality.
Ano: 2001 URL: http://www.alice.cnptia.embrapa.br/handle/doc/658302
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Compte rendu des premières expérimentations de fécondation artificielle chez l'ombrine, Sciaenops ocellatus : études préliminaires de la maturation finale des ovocytes et de la qualité du sperme ArchiMer
Gardes, Lionel; Buchet, Vincent; Villanove, Philippe; Fauvel, Christian.
Artificial insemination mastery in red drum, Sciaenops ocellatus, requires a first experimental step wOOng at getting basic biological data. Regarding males, a relation between optical density of the solution (OD) measured by spectrophotometry and sperm concentration (SC) has been established : OD O,161*SC + 0,119. Mean sperm concentration measured is 4,36.10 10 spz.mL-1. This study shows an influence of the solution of dilution on spermatozoa motility and its evolution during short term preservation. As far as females are concemed, the follow-up of final maturation through the observation of samples taken during reguIar strippings, seems to he a good technique to limit overripening and spontaneous liheration of ovules. Some artificial insemination trials...
Tipo: Text Palavras-chave: Fécondation artificielle; Concentration spermatique; Motilité du sperme; Ovogenèse; Ovulation; Sur maturation; Ombrine; Sciaenops ocellatus.; Artificial insemination; Sperm concentration; Sperm motility; Oogenesis; Ovulation; Overripening; Red drum.; Sciaenops ocella/us.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00366/47755/47801.pdf
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Desempenho de ovelhas Pantaneiras submetidas à sincronização de estro e suplementação nutricional de curto prazo antes da estação reprodutiva. Repositório Alice
NEVES, A. P..
Resumo: A eficiência reprodutiva de rebanhos ovinos está na dependência de vários fatores, dentre os mais importantes cita-se a nutrição. Alterações no nível de nutrição podem influenciar a eficácia da maioria das fases da reprodução. Porém, pouco se tem aproveitado deste conhecimento nas criações de ovinos. Portanto, o objetivo deste trabalho foi verificar a influência da suplementação de curto prazo antes da estação monta sobre o desempenho reprodutivo de fêmeas ovinas do grupo genético ?Ovelha Pantaneira? submetidas a protocolos de sincronização de estro. Foram utilizadas 60 fêmeas, divididas aleatoriamente em seis grupos experimentais, sendo três grupos submetidos a protocolo hormonal de indução de estro e submetido a diferentes períodos de...
Tipo: Tese/dissertação (ALICE) Palavras-chave: Grupo genético; Ovelha Pantaneira; Gado Pantaneiro; Foliculogênese; Protocolo hormonal; Folliculogenesis; Hormonal protocol; Ovino; Reprodução animal; Eficiência reprodutiva; Nutrição animal; Suplemento alimentar; Ovulação; Sheep; Reproduction; Reproductive performance; Ovulation; Animal nutrition; Supplementary feeding; Animal feeding.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1065600
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Diferentes posologias de flunixin meglumine na prevenção da regressão prematura de corpos lúteos em cabras superovuladas. Repositório Alice
SALLES, H. O.; SOARES, A. T.; ANDRIOLI, A.; MOURA SOBRINHO, P. A. de; AZEVEDO, H. C..
Resumo: O presente trabalho objetivou testar a eficiência na redução da freqüência de aplicações do flunixin meglumine a partir de duas dosagens, em relação à taxa de corpos lúteos regredidos prematuramente. Utilizou-se 18 fêmeas de raças caprinas leiteiras, Saanen e Anglo-nubiana, as quais foram submetidas à sincronização do estro com esponjas intravaginais e cloprostenol, e à superovulação com FSH suíno. Três dias após a retirada das esponjas os animais foram submetidos a três tratamentos (T1; T2 e T3) com as seguintes dosagens de flunixin meglumine por kg de peso corpóreo (PC) e por aplicação: 1,1mg; 1,1mg e 2,2 mg, respectivamente, sendo realizadas em T1 oito aplicações intervaladas por 12 horas e em T2 e T3 quatro aplicações intervaladas por 24 h....
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Regressão prematura; Brasil; Ceará; Caprino; Cabra; Superovulação; Corpo lúteo; Dosagem; Goats; Superovulation; Ovulation; Drugs; Flunixin.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/handle/doc/515259
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Different protocols using PGF2a as ovulation inducer in Nelore cows subjected to estradiol-progesterone timed AI based protocols. Repositório Alice
PFEIFER, L. F. M.; RPDRIGUES, W. B.; SILVA, K. C. da; ANACHE, N. A.; CASTRO, N. A.; CASTILHO, E. M.; NOGUEIRA, E..
The objective of this study was to evaluate the effect of a PGF2&#945;-analogue (PGF) on ovulation and pregnancy rates after timed artificial insemination (TAI) in cattle. In Experiment 1 cows received an intravaginal progesterone-releasing device (CIDR) plus 2 mg im of estradiol benzoate (EB) on Day 0. The CIDR devices were removed on Day 8, and all cows received 150 &#956;g im of d-cloprostenol (PGF2&#945;-analogue), 300 IU of eCG and 1 mg of estradiol cypionate (ECP) im. On Day 9, cows were randomly assigned into two groups: 1) ECP Group (n = 17), that did not receive any further treatment; and 2) ECP-PG Group (n = 14) that were given 150 &#956;g of d-cloprostenol (PGF) as adjuvant stimulus for ovulation. No difference between groups was...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Gametes; Ovulação animal; Reprodução Animal; Beef; Beef cattle; Ovulation.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1095965
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Does supplemental LH changes rate and time to ovulation and embryo yield in Santa Ines ewes treated for superovulation with FSH plus eCG?. Repositório Alice
OLIVEIRA, M. E. F.; CORDEIRO, M. F.; FERREIRA, R. M.; SOUZA, S. F.; PIERONI, J. S. P.; RODRIGUES, L. F. de S.; FONSECA, J. F. da; VICENTE, W. R. R..
Abstract: The objective was to evaluate if supplemental LH given at the end of FSH treatment would synchronize the time of ovulation and increase the ovulation rate and embryo yield in Santa Ines ewes. Twenty superovulatory (SOV) programs were accomplished in cross-over design (60d interval). On D0, a CIDR device was inserted, and the device was replaced with a new one 7 days later, when 37.5µg of d-cloprostenol was administered. On D12, we started the SOV treatment, administering 256mg of pFSH 8 times, 12h apart. On D14, the CIDR was removed, and 200IU of eCG and 37.5µg of d-cloprostenol were administered. On D15, the ewes were allocated into one of two groups, a Control group (n=10) that received no supplemental LH and a LH group (n=10) treated with...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: LH; Ovino; Reprodução animal; Ovulação; Superovulação; Embrião animal; Raça Santa Inês; Sheep; Animal reproduction; Superovulation; Embryo; Ovulation.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/929662
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Does supplemental LH changes rate and time to ovulation and embryo yield in Santa Ines ewes treated for superovulation with FSH plus eCG? Ciência Rural
Oliveira,Maria Emilia Franco; Cordeiro,Mabel Freitas; Ferreira,Roberta Machado; Souza,Samuel Figueirêdo; Pieroni,Juliana Souza Pinto; Rodrigues,Luiz Fernando de Souza; Fonseca,Jeferson Ferreira da; Vicente,Wilter Ricardo Russiano.
The objective was to evaluate if supplemental LH given at the end of FSH treatment would synchronize the time of ovulation and increase the ovulation rate and embryo yield in Santa Ines ewes. Twenty superovulatory (SOV) programs were accomplished in cross-over design (60d interval). On D0, a CIDR device was inserted, and the device was replaced with a new one 7 days later, when 37.5µg of d-cloprostenol was administered. On D12, we started the SOV treatment, administering 256mg of pFSH 8 times, 12h apart. On D14, the CIDR was removed, and 200IU of eCG and 37.5µg of d-cloprostenol were administered. On D15, the ewes were allocated into one of two groups, a Control group (n=10) that received no supplemental LH and a LH group (n=10) treated with 7.5mg of LH...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Superovulation; LH; Ovulation; Embryo; Sheep.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012000600021
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Duration of estrus and time of ovulation in superovulated Santa Inês ewes. Repositório Alice
LIMA, J. T. M.; FONSECA, J. F. da; ESTEVES, L. V.; PENEIRAS, A. B. V.; LIMA, M. S. D.; BRANDÃO, F. Z..
Abstract: The aim of this study was to determine the intervals between sponge removal and the onset of estrus, sponge removal and the first detected ovulation, and onset of estrus and the first ovulation, and also to determine the duration of estrus, in superovulated Santa Inês ewes subjected to natural mating (NM) and AI. The trial was done in July and February at Cachoeiras de Macacu?Rio de Janeiro (22°27'S, 43°39'W). Fifteen non-pregnant Santa Inês ewes, age 3.4 ± 1.4 years, weighing 47.8 ± 6.3 kg, with 3.3 ± 0.4 body condition score (scale of 1 to 5), were randomly assigned to 2 groups. Both groups were superovulated using the same protocol and were mated in a crossover design by NM and laparoscopic AI. Estrus was synchronized using intravaginal...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Raça Santa Inês; Ovino; Ovelha; Superovulação; Ovulação; Ciclo estral; Reprodução animal; Sheep; Ovulation; Reproduction; Superovulated females; Superovulation; Oestrus synchronization.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/966395
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"Efecto macho" en la ovulación postparto de ovejas pelibuey amamantando. Colegio de Postgraduados
Montiel Castelán, Ma. Isabel.
Se realizaron dos experimentos para evaluar el efecto del amamantamiento y “efecto macho” en la ovulación en el periodo postparto (PP) en la oveja Pelibuey. En el experimento 1, a los 10 días postparto, dos tratamientos se asignaron al azar a las ovejas con sus crías: Amamantamiento continuo (AC) y amamantamiento controlado (Ac). En AC, las crías permanecieron todo el tiempo con ellas (24h d-1) y en Ac, crías permanecieron por dos periodo de 30 min d-1 (08:00 a 08:30 h y de 17:00 a 17:30 h). En el experimento 2, se hizo el mismo sistema de manejo de amamantamiento que en experimento 1, al azar se conformaron cuatro grupos; amamantamiento continuo (AC), amamantamiento continuo con “efecto macho” (AC+EM), amamantamiento controlado (Ac) y amamantamiento...
Palavras-chave: Amamantamiento; Efecto macho; Ovulación; Período postparto; Ovejas Pelibuey; Suckling; Male effect; Ovulation; Post-partum period; Pelibuey ewes; Ganadería; Maestría.
Ano: 2014 URL: http://hdl.handle.net/10521/2220
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"Efecto macho" y su relación con el anestro postparto en la oveja pelibuey amamantando. Colegio de Postgraduados
Cruz Espinoza, Francisco.
Se realizaron dos experimentos para evaluar el “efecto macho” y el amamantamiento en el restablecimiento de la actividad ovárica postparto en ovejas Pelibuey. En el experimento 1, se utilizaron 73 ovejas, que se distribuyeron al azar en cuatro tratamientos: T1, amamantamiento continuo sin macho (n=18), crías con madres durante todo el experimento; T2, amamantamiento continuo con macho (n=18), igual que T1 más “efecto macho” (07:00 a 07:30 h y de 16:00 a 16:30 h); T3, amamantamiento controlado con macho (n=18), las crías tuvieron contacto con sus madres en dos periodos (08:00 a 08:30 h y de 18:00 a18:30 h); y, T4, amamantamiento controlado sin macho (n=19). En el experimento 2, se utilizaron 108 ovejas, distribuidas al azar en dos tratamientos: T1,...
Palavras-chave: Ovinos; Bioestimulación; Periodo postparto; Ovulación; Amamantamiento; Sheep; Bioestimulation; Postpartum period; Ovulation; Suckling.
Ano: 2011 URL: http://hdl.handle.net/10521/587
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Effects of a single use of the GnRH analog buserelin on the induction of ovulation and endocrine profiles in heavy draft mares OAK
MIKI, Wataru; ONIYAMA, Hiroyuki; TAKEDA, Naomasa; KIMURA, Yuki; HANEDA, Shingo; MATSUI, Motozumi; TAYA, Kazuyoshi; NAMBO, Yasuo.
We observed structural changes in the follicles and uterus of heavy draft mares during estrus and examined the effect of a single injection of the gonadotropin-releasing hormone analog buserelin on ovulation and endocrine profiles. Twenty-two heavy draft mares were divided into a buserelin-treated group (n=8) and a control group (n=14). Mares were given an intramuscular injection of 40 µg buserelin when they presented signs of estrus to a teaser stallion, had ≥45 mm diameter follicles, and presented decreased uterine edema compared with the previous examination. The follicles and uterus were monitored using transrectal ultrasound imaging and measurement of blood levels of luteinizing hormone (LH), follicle-stimulating hormone (FSH), progesterone, and...
Palavras-chave: GnRH analog buserelin; Heavy draft mares; Ovulation; Single injection; Uterine edema.
Ano: 2016 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4397
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Effects of GnRH administration on ovulation and fertility in ewes subjected to estrous synchronization. Repositório Alice
CAVALCANTI, A. dos S.; BRANDÃO, F. Z.; NOGUEIRA, L. A. G.; FONSECA, J. F. da.
Abstract: The objective of this study was to verify the effects of GnRH on ovulation and pregnancy of ewes subjected to a short-term synchronization of estrus. Santa Inês and crossbred Santa Inês/Dorper ewes received 60 mg MAP sponges during 6 days plus 300 IU eCG and 30 µg d-cloprostenol 24 h prior to sponge withdrawal (SW). Ewes were assigned to receive 0.9% NaCl solution (Tcontrol; n = 32) or 25 µg GnRH (licerelin, TGnRH; n = 34) 24 hours after SW. Each group was assigned to intrauterine insemination by laparoscopy (n = 25) or to natural mating (n = 41). Artificial insemination was performed with a single dose of fresh semen. For controlled mating, females were exposed to males 12, 24, 36 and 48 hours after SW. Ten females per treatment were subjected...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Raça Santa Inês; Intravaginal progesterone insert; Pregnancy rate; Ovino; Reprodução animal; Inseminação artificial; Progesterona; Sincronização do cio; Ciclo estral; Ovulação; Taxa de prenhez; Sheep; Artificial insemination; Ovulation; Progesterone; Oestrus synchronization.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/929671
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Effects of GnRH administration on ovulation and fertility in ewes subjected to estrous synchronization R. Bras. Zootec.
Cavalcanti,Amanda dos Santos; Brandão,Felipe Zandonadi; Nogueira,Luiz Altamiro Garcia; Fonseca,Jeferson Ferreira da.
The objective of this study was to verify the effects of GnRH on ovulation and pregnancy of ewes subjected to a short-term synchronization of estrus. Santa Inês and crossbred Santa Inês/Dorper ewes received 60 mg MAP sponges during 6 days plus 300 IU eCG and 30 µg d-cloprostenol 24 h prior to sponge withdrawal (SW). Ewes were assigned to receive 0.9% NaCl solution (Tcontrol; n = 32) or 25 µg GnRH (licerelin, T GnRH; n = 34) 24 hours after SW. Each group was assigned to intrauterine insemination by laparoscopy (n = 25) or to natural mating (n = 41). Artificial insemination was performed with a single dose of fresh semen. For controlled mating, females were exposed to males 12, 24, 36 and 48 hours after SW. Ten females per treatment were subjected to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Artificial insemination; Intravaginal progesterone insert; Ovulation; Pregnancy rate; Sheep.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000600014
Registros recuperados: 67
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