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| Registros recuperados: 26 | |
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| Pinna,A.E.; Brandão,F.Z.; Cavalcanti,A.S.; Borges,A.M.; Souza,J.M.G.; Fonseca,J.F.. |
| The aim of this study was to verify the efficacy of reusing intravaginal progesterone (P4) devices on the reproductive parameters in Santa Inês ewes. Females received intravaginal P4 devices for their first, second or third use for five days plus 300 IU eCG IM and 5mg dinoprost laterovulvar 24h before device removal. Blood was collected at different moments. Transrectal ultrasonography was performed from device removal to ovulation. Part of the ewes were submitted to artificial insemination by laparoscopy (IAL - n=55) with fresh semen, whereas the rest were bred by fertile rams (n=41). On the initial 18 h, ewes that received devices for the first time showed higher P4 concentrations (5.1±1.8 vs 3.5±1.4 vs 2.4±1.1 - P<0.05). However, after the first 48h... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sheep; Artificial insemination; CIDR; Intravaginal progesterone insert; Ovulation. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000200012 |
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| 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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| Fonseca,J.F.; Maffili,V.V.; Santos,A.D.F.; Fürst,R.; Prosperi,C.P.; Rovay,H.; Souza,J.M.G.; Torres,C.A.A.. |
| This study reported the effects of prostaglandin (PGF2a) administration 10 days apart on reproductive parameters of cyclic artificial inseminated (AI) nulliparous Alpine (n=9) and Saanen (n=9) goats. Animals received two doses of 22.5mg PGF2a 10 days apart. After 1st and 2nd PGF2a administrations, estrus was monitored at 12 h intervals, with a buck teaser. Plasma progesterone concentration (ng/mL) was determined from blood sampled on day 0 (1st PGF2a) and the following 5, 10 (2nd PGF2a), 15, 20, 25 and 30 days. After the onset of the second estrus, females were transrectally (5 MHz probe) scanned at 4 hour intervals until at least 8h after ovulation. Pregnancy was checked through transrectal ultrasound on days 20, 25, 30, 35 and 90 after insemination. All... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Estrus; Ovulation; Progesterone; Embryo loss; Goat. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000200014 |
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| Figueiredo,Tatiana; Paiva,Roman; Kozicki,Luiz Ernandes; Kaercher,Fernanda; Weiss,Romildo Romualdo; Santos,Ivo Walter dos; Muradas,Priscilla Ricabone. |
| The aim this study was to compare two protocols of induction for ovulation by desloreline acetate and hCG in Quarter Horse mares. The choice of the animals was based on the observations by the estrus, by rectal palpation of the ovaries and by ultrassonography of the follicular dynamics. After estrus detection and follicle control, the measurement of the follicles and the classification of uterus were carried out. The animals that had dominant follicle (diameter more than 35 mm) and swollen uterus were used. In these conditions, the mares received hCG or desloreline acetate. Once ovulation occurred, the artificial insemination was carried. Two groups were performed: G1 (20 animals) received 1.5 mg desloreline acetate and G2 (20 animals) received 1700 IU of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ovulation; Deslorelin acetate; Human chorionic gonadotrophin; Quarter horse mares. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000300012 |
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| Gomes,C.M.; Frantz,P.J.; Sanvitto,G.L.; Anselmo-Franci,J.A.; Lucion,A.B.. |
| Since previous work has shown that stimulation early in life decreases sexual receptiveness as measured by the female lordosis quotient, we suggested that neonatal handling could affect the function of the hypothalamus-pituitary-gonadal axis. The effects of neonatal handling on the estrous cycle and ovulation were analyzed in adult rats. Two groups of animals were studied: intact (no manipulation, N = 10) and handled (N = 11). Pups were either handled daily for 1 min during the first 10 days of life or left undisturbed. At the age of 90 days, a vaginal smear was collected daily at 9:00 a.m. and analyzed for 29 days; at 9:00 a.m. on the day of estrus, animals were anesthetized with thiopental (40 mg/kg, ip), the ovaries were removed and the oviduct was... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Stress; Neonatal handling; Estrous cycle; Ovulation; Female rat. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999001000010 |
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| Quirino,Monike; Pinheiro,Ana Raquel Almeida; Santos,Joabel Tonellotto dos; Ulguim,Rafael da Rosa; Mellagi,Ana Paula Gonçalves; Bortolozzo,Fernando Pandolfo. |
| ABSTRACT: Fixed-time artificial insemination (FTAI) is a reproductive technology that aids in obtaining an appropriate time to perform single artificial insemination (AI), thus reducing the number of inseminations per sow bred. FTAI protocols can either be based on estrus detection or day of weaning, aiming to synchronize ovulation using ovulation inducers. The protocols involving estrus detection usually employ porcine luteinizing hormone (pLH) as an inducer and, in general, satisfactory reproductive performance is observed. For protocols based on weaning day, the main hormone used is analog of gonadotropin-releasing hormone such as triptorelin and buserelin. Regardless of the protocol, the number of piglets born is usually not affected by FTAI. However,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ovulation; Synchronization; Single insemination; Sows; Gilts. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000200700 |
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| 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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| 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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| 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,... |
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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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| SATRAPA, R.; VIANA, J.; DANTAS, F. L.; MARCELINO, R. R.; VASCONCELOS, N. L.; LUCKENR, M. N.; ESTEVES NETO, J.; CARNEIRO JUNIOR, J. M.; SATRAPA, R. A.; CAVALCANTE, F. A.. |
| Esta publicação apresenta os resultados do protocolo hormonal nas sincronizações de ovulações para transferência de embriões em tempo fixo (TETF), aplicado em alguns rebanhos leiteiros do Estado do Acre, componentes do programa de transferência de embriões da Emdga no Estado do Acre. |
| Tipo: Folhetos |
Palavras-chave: Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Ganado de leche; Ovulación; Transferencia de embriones; Reproducción de animales; Gado leiteiro; Transferência de embrião; Ovulação; Melhoramento genético animal; Embryo transfer; Dairy cattle; Animal reproduction; Ovulation. |
| Ano: 2012 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/972235 |
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| 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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| 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... |
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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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| ACOSTA, Tomas J.; TETSUKA, Masa; MATSUI, Motozumi; SHIMIZU, Takashi; BERISHA, Bajram; SCHAMS, Dieter; MIYAMOTO, Akio; 松井, 基純; 清水, 隆; 宮本, 明夫. |
| The aim of the present in vivo study was to monitor real-time fluctuations of cortisol (Cr) in the wall of preovulatory follicles using a microdialysis system (MDS) implanted in the theca layer as well as changes in ovarian venous plasma (OVP) and jugular venous plasma (JVP). Seven cows were superovulated using FSH and prostaglandin F2α injections. Dialysis capillary membranes were surgically implanted into the theca layer of mature follicles and connected to a microdialysis system. Fractions of the perfusates were collected from Day -1 (Day 0=LH surge) to Day 3. No difference in the concentrations of Cr between JVP and OVP was detected throughout the experiment. Circulating concentrations of Cr ranged from 20 to 35 ng/ml 8 h after surgery in ovulatory and... |
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Palavras-chave: Bovine; Cortisol; Follicle; Ovary; Ovulation. |
| Ano: 2005 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2980 |
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| Registros recuperados: 26 | |
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