Consulta: subjectFacets:"Gonadotropins"
Registros recuperados: 16
Data/hora: 14/06/2024 03:01:06

Nonsurgical embryo recovery in Lacaune ewes superovulated with different doses of FSH.
Provedor de dados: 119
Autores: MAIA, A. L. R. e S.; FIGUEIRA, L. M.; ALVES, N. G.; BATISTA, R. I. T. P.; ARRAIS, A. M.; VERGANI, G. B.; PRATES, J. F.; FONSECA, J. F. da; SOUZA-FABJAN, J. M. G.
Abstract: Multiple ovulation and embryo transfer (MOET) is a reproductive biotechnique that allows accelerated genetic improvement of the species. In ruminants, the variability of the superovulatory response is a limiting factor for MOET programs. In addition, specifically in sheep, it is difficult to conduct embryo recovery by transcervical via, due to the anatomy of the cervical canal. The dose of 100 mg pFSH appeared to be not sufficient to reach a high superovulation response while 200 mg resulted in good superovulatory response. [Coleta transcervical de embriões em ovelhas da raça Lacaune superovuladas com diferentes doses de FSH].
Tipo: Anais e Proceedings de eventos
Palavras-chave: Reproductive biotechnology; Animal biotechnology; Biotecnologia da reprodução; Ovino; Ovelha; Reprodução Animal; Gonadotrofina; Sheep; Gonadotropins.
Ano: 2019
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1112222

Induction of accessory corpus luteum in goats and sheep: From physiological basis to reproductive effects.
Provedor de dados: 119
Autores: FONSECA, J. F. da; VERGANI, G. B.; CÔRTES, L. R.; RODRIGUES, J. N. D.; SIQUEIRA, L. G. B.; SOUZA-FABJAN, J. M.; OLIVEIRA, M. E. F.
Abstract: The identification of ovarian follicular waves and associated hormonal milieux has revealed that dominant follicles of the ovulatory wave (OWDF) grow in a hormonal environment where there is an increasing predominance of estradiol, unlike first-wave dominant follicles (FWDF) and intermediate-wave dominant follicles (IWDF), which grow under increasing progesterone (P4) concentrations. The luteinizing hormone (LH) is considered the decisive gonadotropic hormone to direct whether a dominant follicle will (? LH) or will not (? LH) ovulate. Based on this, strategies have been developed to either increase endogenous LH (GnRH administration) or provide exogenous LH of porcine origin (pLH) or LH-like gonadotropins, such as human chorionic gonadotropin...
Tipo: Anais e Proceedings de eventos
Palavras-chave: Onda folicular ovariana; CLa; HCG; Caprino; Ovino; Reprodução Animal; Eficiência Reprodutiva; Progesterona; Gonadotrofina; Corpo Lúteo; Ciclo Estral; Animal reproduction; Gonadotropins; Progesterone; Estrous cycle; Reproductive efficiency.
Ano: 2021
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1140746

Avaliação de duas doses de eCG na indução do estro sincronizado em ovelhas leiteiras da raça Lacaune em contra-estação reprodutiva no Rio de Janeiro.
Provedor de dados: 119
Autores: RIBEIRO, A. C. S.; BALARO, M. F. A.; DELGADO, K. F.; FERNANDES, D. A. de M.; FONSECA, J. F. da; BRANDÃO, F. Z.
Tipo: Parte de livro
Palavras-chave: Ovino leiteiro; Raça Lacaune; Gonadotrofina coriônica equina; Indução do estro; Taxa de prenhez; Prolificidade; PMSG; Synchronization.; Gonadatrofina; Ovelha; Reprodução animal; Ciclo estral; Sincronização do cio.; Sheep; Gonadotropins; Animal reproduction.
Ano: 2015
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1019681

Induction of synchronized estrus in dairy goats with different gonadotrophins.
Provedor de dados: 119
Autores: FONSECA, J. F. da; BRUSCHI, J. H.; ZAMBRINI, F. N.; DEMCZUK, E.; VIANA, J. H. M.; PALHÃO, M. P.
The objective of this study was to evaluate lhe efficiency of two gonadotrophins in induction of estrus in dairy goats. A total of 47 dairy goats were randomly divided according to breed into two treatments (T1 and T2). In both treatments, goats received intravaginal sponges containing 60 mg medroxy-progesterone acetate for six days and sub- vulvar administration of 22.5 mg of d-cloprostenol at the time of sponge insertion. In TI (n=23) and T2 (n=24), animaIs received intramuscuIar administration of 200 lU and 250 lU of eCG and hCG, respectively. After sponge removal, goats were monitored twice daily (06:00 a.m. and 18:00 p.m.) with bucks. Animals were bred at lhe start of estrus and at each 12 hours interval until lhe end of estrus. Pregnancy was checked...
Tipo: Artigo de periódico
Palavras-chave: Caprino leiteiro; Performance reprodutiva; Estro; Sincronização; ECG; HCG; Brasil; Minas Gerais.; Endocrinologia; Gonadotrofina; Reprodução Animal.; Cabra Leiteira; Gonadotropins; Estrus synchronization; Dairy goats; Brazil.
Ano: 2005
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/531522

Comportamento estral, dinâmica ovulatória e descarga de muco cervical em cabras Toggenburg submetidas à indução de estro com diferentes gonadotrofinas.
Provedor de dados: 119
Autores: FONSECA, J. F. da; CRUZ, R. C.; MANCIO, A. B.; ESTEVES, L. V.; BRANDÃO, F. Z.; FACO, O.
Este estudo avaliou os efeitos do uso de diferentes gonadotrofinas sobre a manifestação do estro, dinâmica ovulatória e características do muco cervical de cabras Toggenburg em anestro. As ovulações ocorreram na presença do muco 4. O FSH e a hCG, associados à progesterona, podem ser considerados para a indução de estro de cabras. O tipo de muco cervical está associado ao tamanho do folículo e à ovulação, podendo ser critério adicional na escolha do melhor momento para a inseminação artificial.
Tipo: Parte de livro
Palavras-chave: Muco cervical; Induced ovulation; Oestrous cycle.; Caprino; Cabra; Reprodução animal; Indução; Ciclo estral; Gonadotrofina; Goats; Reproduction; Gonadotropins; Toggenburg.
Ano: 2012
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1070471

Uso de diferentes gonadotrofinas na indução de estro em cabras Toggenburg.
Provedor de dados: 119
Autores: CRUZ, R. C.; MANCIO, A. B.; ESTEVES, L. V.; FONSECA, J. F. da.
Use of different gonadotrophins to induce estrus in Toggenburg goats.
Tipo: Anais e Proceedings de eventos
Palavras-chave: Indução de estro; Estrous induction.; Gonadotrophins; Cabra; Caprino; Gonadotrofina; Goats; Animal reproduction; Gonadotropins; Equine chorionic gonadotropin.
Ano: 2011
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/906902

Association of controlled light program, cloprostenol and gonadotropins for synchronous estrus induction and fixed time artificial insemination in dairy goats during the non-breeding season: preliminary results.
Provedor de dados: 119
Autores: MORAIS, M. C. C.; ARRAIS, A. M.; SILVA, N. C.; OLIVEIRA, M. E. F.; SOUZA-FABJAN, J. M. G.; FONSECA, J. F. da.
Animal preparation prior to artificial insemination (AI) in goats usually involves a combination of intravaginal devices containing progesterone/progestagens plus PGF2?? analogues and gonadotropins, being eCG the most used. The use of intravaginal devices soaked in synthetic progesterone analogues requires milk discard for 60 days. Progesterone soaked intravaginal devices, as synthetic ones, are associated with more animal handling and discomfort. In addition, it leads to environmental impacts because it generates more residues. On the other hand, eCG has presented continuous restriction due to animal welfare issues associated with its production (Vilanova et al., Animals, 9:1053, 2019) and it has been substituted by hCG for this purpose. This study tested...
Tipo: Anais e Proceedings de eventos
Palavras-chave: Dairy goats; Animal reproduction; Estrus synchronization; Artificial insemination; Gonadotropins.
Ano: 2020
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1132676

Taxa de ovulação e viabilidade embrionária em caprinos superovulados com folltropin-V e super-OV.
Provedor de dados: 119
Autores: SALLES, H. O.; ANDRIOLI, A.; SOARES, A. T.; MOURA SOBRINHO, P. A.
Tipo: Artigo de periódico
Palavras-chave: Brasil; Ceará; Taxa de ovulação; Viabilidade embrionária; Embryo viability; FSH; LH; Gonadatrofina.; Caprino; Hormônio animal; Superovulação.; Goats; Superovulation; Brazil; Hormones; Gonadotropins.
Ano: 1998
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/926598

Do sheep breed effect influence superovulatory responses and embryos yields?.
Provedor de dados: 119
Autores: PUPIN, M. A. F.; VERGANI, G. B.; LIMA, M. S. D.; SILVA, K. de M.; RAMOS, A. F.; BATISTA, R. I. T. P.; FONSECA, J. F. da; OLIVEIRA, M. E. F.
The aim was evaluated the breed effect on superovulatory responses and embryo yields in Brazilian native ewes submitted to a mid-term progesterone-based protocol and gonadotrophic treatment with 133 mg of pFSH. The study was conducted in the northeast of Brazil in ewes of three breeds: Morada Nova (MN; n=10); Santa Inês (SI; n=10) and Somalis (SO; n=10).
Tipo: Anais e Proceedings de eventos
Palavras-chave: Sheep; Animal reproduction; Embryo transfer; Progesterone; Gonadotropins; Brazil.
Ano: 2020
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1132657

Clinical and molecular analysis of human reproductive disorders in Brazilian patients
Provedor de dados: 56
Autores: Latronico,A.C.; Costa,E.M.F.; Domenice,S.; Correa,R.V.; Kohek,M.B.F.; Arnhold,I.J.P.; Mendonca,B.B.
Several genes that influence the development and function of the hypothalamic-pituitary-gonadal-axis (HPG) have been identified. These genes encode an array of transcription factors, matrix proteins, hormones, receptors, and enzymes that are expressed at multiple levels of the HPG. We report the experience of a single Endocrinology Unit in the identification and characterization of naturally occurring mutations in families affected by HPG disorders, including forms of precocious puberty, hypogonadism and abnormal sexual development due to impaired gonadotropin function. Eight distinct genes implicated in HPG function were studied: KAL, SF1, DAX1, GnRH, GnRHR, FSHß, FSHR, and LHR. Most mutations identified in our cohort are described for the first time in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hypogonadism; Puberty; Gonadotropins; Genetic mutation.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000100019

Is the infertility in hypothyroidism mainly due to ovarian or pituitary functional changes?
Provedor de dados: 56
Autores: Armada-Dias,L.; Carvalho,J.J.; Breitenbach,M.M.D.; Franci,C.R.; Moura,E.G.
The objective of the present study was to examine whether hypothyroidism affects the reproductive system of adult female rats by evaluating ovarian morphology, uterus weight and the changes in serum and pituitary concentrations of prolactin and gonadotropins. Three-month-old female rats were divided into three groups: control (N = 10), hypothyroid (N = 10), treated with 0.05% 6-propyl-2-thiouracil (PTU) in drinking water for 60 days, and T4-treated group (N = 10), receiving daily sc injections of L-thyroxine (0.8 µg/100 g body weight) during the last 10 days of the experiment. At the end of 50 days of hypothyroidism no hypothyroid animal showed a regular cycle, while 71% of controls as well as the T4-treated rats showed regular cycles. Corpora lutea,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hypothyroidism; Prolactin; Gonadotropins; Folliculogenesis; Estrous cycle.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000900015

Efecto macho en la dinámica folicular de ovejas de lana superovuladas.
Provedor de dados: 32
Autores: Domínguez Islas, Manuel.
Se evaluó la incorporación del “efecto macho” a un protocolo de superovulación. Se utilizaron 20 ovejas de lana de la raza Suffolk, Hampshire y Dorset, de condición corporal (cc)  3.1 ± 0.4, con edad promedio de 3.9 ± 0.8 años, durante época de transición de anestro a temporada reproductiva en los meses de junio-julio del 2011. Se asignaron 10 ovejas de manera aleatoria en dos lotes. Los tratamientos fueron los siguientes: Tratamiento 1 (T1): se introdujo un CIDR (considerado día 0) a cada ovejas durante 9 días, 48 horas previas al retiro, se administro 500 μg de Cloprostenol, además de 300 UI de Gonadotropina coriónica equina (eCG) y 250 UI de gonadotropinas hipofisarias de cerdo cada 12 horas (48, 36, 24, 12, 0 previas al retiro y 12 h después del...
Palavras-chave: Efecto macho; Ovejas; Anestro; Gonadotropinas; Folículo; Ganadería; Maestría; Male effect; Ewes; Anestrus; Gonadotropins; Follicle.
Ano: 2012
URL: http://hdl.handle.net/10521/1779

Effect of Ethanol Extract of Whole Plant of Trichosanthes cucumerina var. cucumerina L. on Gonadotropins, Ovarian Follicular Kinetics and Estrous Cycle for Screening of Antifertility Activity in Albino Rats
Provedor de dados: 77
Autores: Kage,Devendra N; Malashetty,Vijaykumar B; Seetharam,Y. N; Suresh,P; Patil,Saraswati B.
Ethanol extract of whole plant of Trichosanthes cucumerina L. var. cucumerina was evaluated for antiovulatory activity in adult rats. The ethanol extract at the doses 200 and 400mg/kg body weight (orally) affected the normal estrous cycle showing a significant increase in estrus and metestrus phases and decrease in diestras and proestrus phases. The extract also significantly reduced the number of healthy follicles (Class I-Class VI) and corpora lutea and increased the number of regressing follicles (Stage IA, Stage IB, Stage IIA, and Stage IIB). The protein and glycogen content in the ovaries were significantly reduced in treated rats. The cholesterol level was significantly increased, whereas, the enzyme activities like 3b-HSD and 17b-HSD were...
Tipo: Journal article
Palavras-chave: Trichosanthes cucumerina L. var. cucumerina; Antifertility; Folliculogenesis; Estrous cycle; Gonadotropins; 3 b-HSD; 17 b-HSD activity; Ovarian steroidogenesis.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000100030

Social and reproductive physiology and behavior of the Neotropical cichlid fish Cichlasoma dimerus under laboratory conditions
Provedor de dados: 83
Autores: Alonso,Felipe; Cánepa,Maximiliano; Moreira,Renata Guimarães; Pandolfi,Matías.
In this work we describe for the first time the social and reproductive behavior of the Neotropical fish Cichlasoma dimerus (Heckel, 1840) [Perciformes: Cichlidae], endemic to the Paraná River basin, using a comprehensive-integral approach, including morphological and physiological features. This substrate breeding fish has biparental care of the fry and presents a dominance hierarchy that determines access to breeding territories among males, and to males with territories among females. Gregarious behavior associated with a pale body color, was observed before reproductive behaviors started. Afterwards, a dominance hierarchy was established through aggressive interactions. Territorial individuals had bright body color patterns and non territorial an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cichlidae; Cortisol; Gonadosomatic index; Gonadotropins; Somatolactin.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000300009

Seasonal variation in the reproductive activity of male goats raised under tropical climate conditions
Provedor de dados: 96
Autores: Dias,Júlio César Oliveira; Veloso,Cristina Mattos; Santos,Madriano Christilis da Rocha; Oliveira,Carlos Thiago Silveira Alvim Mendes de; Silveira,Camila Oliveira; Iglesias,Erick; Maitan,Paula Piccolo; Sanglard,Letícia Maria Pereira.
ABSTRACT This study analyzed seasonal variations in the testes, the concentration of sex hormones, the parameters of fresh and thawed semen, and the sexual behavior of male Alpine goats from a temperate region in a tropical climate and possible interference with fertility. The maximum and minimum temperature and luminosity were recorded daily, while seminal, hormonal, and behavioral assessments were carried out every fortnight. The maximum and minimum temperature (°C) and luminosity (h) were recorded daily always at 17.00 h. The scrotal circumference (cm), testicular volume (mL), volume (mL), appearance (creamy, milky, aqueous) and coloration (white, white-yellowish, and yellowish) seminal, turbulence or mass movement (0 to 5), progressive spermatic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gonadotropins; Semen quality; Sexual behavior; Testosterone.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000300192

Melatonin in maturation media fails to improve oocyte maturation, embryo development rates and DNA damage of bovine embryos
Provedor de dados: 63
Autores: Takada,Luciana; Martins Junior,Alicio; Mingoti,Gisele Zoccal; Balieiro,Julio César Carvalho; Coelho,Lia Alencar.
Melatonin (MEL) acts as a powerful scavenger of free radicals and direct gonadal responses to melatonin have been reported in the literature. Few studies, however, have evaluated the effect of MEL during in vitro maturation (IVM) on bovine embryos. This study tested the addition of MEL to maturation medium (MM) with no gonadotropins on nuclear maturation and embryo development rates and the incidence of DNA damage in resulting embryos. Cumulus-oocyte complexes were aspirated from abattoir ovaries and cultured in MM (TCM-199 medium supplemented with 10% fetal calf serum - FCS) at 39ºC and 5% CO2 in air. After 24 hours of culture in MM with 0.5 µg mL-1 FSH and 5.0 µg mL-1 LH; 10-9 M MEL) or 10-9 M MEL, 0.5 µg mL-1 FSH and 5.0 µg mL-1 LH, the oocytes were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Comet assay; Embryos; Gonadotropins; In vitro fertilization; Melatonin.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000400003