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Registros recuperados: 16
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B-mode ultrasonography evaluation of superovulatory response in Brazilian native goats. Repositório Alice
VERGANI, G. B.; LIMA, M. S. D.; TEIXEIRA, D. I. A.; SILVA, K. de M.; MONTEIRO, A. W. U.; RAMOS, A. F.; BATISTA, R. I. T. P.; FONSECA, J. F. da; OLIVEIRA, M. E. F..
Abstract: The use of B-mode and color Doppler ultrasonography may replace the use of surgical methods (laparoscopy or laparotomy) in the evaluation of the superovulatory response in sheep, with an accuracy around 74% and 82%, respectively (Oliveira et al. 2018. Reprod Dom Anim, 53:742-750). The ultrasound determination of ovarian response in embryo donor goats still needs to be proven, especially because the non-invasive technique is mandatory when the embryo collection is done by transcervical route. The aim of this study was to correlate the quantification of corpora luteal (CLs) determined by Bmode ultrasound evaluation with the number of recovered structures obtained by transcervical embryo collection of superovulated goats. In view of the above, it is...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Caprino leiteiro; Diagnostic imaging; Ranscervical embryo collection; Cabra Leiteira; Reprodução Animal; Superovulação; Dairy goats; Animal reproduction; Superovulation; Diagnostic techniques.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1112253
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Cervical mucus is not efficient to predict the ovulation time in of Santa Ines ewes synchronized to estrus. Repositório Alice
PAULA, C. J. C. de; BRAIR, V. L.; PRELLWITZ, L.; SILVA, D. dos S.; SCHMIDT, A. P. P.; VERGANI, G. B.; ANDRADE, L. P. A. de; CUNHA, R. O.; SOUZA-FABJAN, J. M.; FONSECA, J. F. da.
Abstract: In goats, it has been demonstrated that cervical mucus evaluation is able to predict the time of ovulation after estrous hormonal synchronization, which is efficient in determining the ideal time of Artificial Insemination (Fonseca et al., 2017. Reprod Biol; 17:363-369). However, in sheep, this parameter is not established in the literature. The study was conducted in Coronel Pacheco (latitude 21?33 'S and longitude 43?16' W), MG, Brazil. These data are different from that reported in goats, i.e., the standardization of mucus score 3 or 4 at the time of ovulation. It may be concluded that the use of cervical mucus is alone not an efficient parameter to detect the time of ovulation in sheep. [O muco cervical não é eficiente em predizer o momento...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Follicular dynamics; Dinâmica folicular; Ultrassonografia; Ovino; Ovelha; Reprodução Animal; Ovulação; Inseminação Artificial; Ultrassom; Sheep; Artificial insemination; Ultrasonography.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1112212
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Effect of estrus synchronization and superovulation protocol on the distribution of ovine embryos at different stages of development. Repositório Alice
BATISTA, R. I. T. P.; VERGANI, G. B.; LIMA, M. S. D.; DIAS, J. H.; TEIXEIRA, D. I. A.; SILVA, K. de M.; MONTEIRO, A. W. U.; OLIVEIRA, M. E. F.; SOUZA-FABJAN, J. M. G.; FONSECA, J. F. da.
Abstract: The compatibility between the embryo development stage and the estrous cycle moment of the embryo recipient is an important factor in the multiple ovulation and embryo transfer (MOET) program. This aspect contributes significantly to the pregnancy establishment. Thus, the present study aimed to evaluate the effect of estrus synchronization and superovulation protocol on the distribution of ovine embryos at different stages of development. In conclusion, the protocol of estrus synchronization and superovulation was efficient in the synchronization of ovulation, which reflected in the prevalence of embryos in the stage of compact morula, when the collection is performed between days D6 and D7 after the first natural mating. This time relative do...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: MOET; In vitro embryo production; Embryonic development; MOTE; Produção in vivo de embriões; Desenvolvimento embrionário; Ovino; Ovelha; Reprodução Animal; Transferência de Embrião; Sheep; Ewes; Animal reproduction; Embryo transfer.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1112205
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Effect of luteal blood flow and number of corpora lutea on the pregnancy rate after fixedtime embryo transfer of cryopreserved embryos in Lacaune recipients evaluated by Color Doppler ultrasonography. Repositório Alice
FIGUEIRA, L. M.; ALVES, N. G.; LUCAS, F. A.; SOUZA-FABJAN, J. M. G.; BATISTA, R. I. T. P.; ARRAIS, A. M.; VERGANI, G. B.; PRATES, J. F.; FONSECA, J. F. da.
Abstract: The Doppler ultrasonography allows the characterization of blood flow and estimation of the functionality of reproductive organs. Therefore, it shows a great potential for use in multiple ovulation and embryo transfer (MOET) programs in ruminants. This study aimed to assess the effect of luteal blood flow and number of corpora lutea (CL) at the moment of embryo transfer to recipient on the establishment of pregnancy in sheep. In conclusion, both the subjective luteal blood flow and the number of CL did not influence the pregnancy rate in recipients of the Lacaune breed. [Efeito do fluxo sanguíneo luteal e número de corpos lúteos na taxa de gestação após transferência em tempo fixo de embriões criopreservados em receptoras Lacaune avaliadas por...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: MOET; Biotechnology of reproduction; Biotecnologia da reprodução; MOTE; Taxa de prenhez; Ovino; Ovelha; Biotecnologia; Reprodução Animal; Corpo Lúteo; Transferência de Embrião; Sheep; Ewes; Small ruminants; Embryo transfer; Corpus luteum; Pregnancy rate.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1112227
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Effect of superovulation protocol on quality and embryonic stage in Moxotó and Canindé goats. Repositório Alice
PINHEIRO, J. B. de S.; BATISTA, R. I. T. P.; VERGANI, G. B.; LIMA, M. S. D.; TEIXEIRA, D. I. A.; SILVA, K. de M.; MONTEIRO, A. W. U.; OLIVEIRA, M. E. F.; SOUZA-FABJAN, J. G.; FONSECA, J. F. da.
For the success of an embryo transfer program, it is necessary to achieve a great synchronization between the embryo donor and recipients. For this, hormonal protocols are commonly used, aiming at a greater number and quality of the viable products, in a shorter period of time. The aim of this study was to assess the effect of the hormonal protocol of estrus synchronization and superovulation in goats on the quality and stage of embryos obtained. In conclusion, the hormonal protocol used for superovulation of goats was effective enough to guarantee embryos in adequate stages and quality for fresh embryo transfer and cryopreservation, avoiding both undesired very young and hatched embryos. [Efeito do protocolo de superovulação sobre a qualidade e estádio de...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: In vivo embryo production; Embryonic development stage; Produção in vivo de embriões; Estágios de desenvolvimento embrionário; Caprino; Superovulação; Transferência de Embrião; Goats; Superovulation; Embryo transfer; Animal reproduction.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1112237
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Follicular population at the beginning of pFSH treatment in Morada Nova ewes submitted to estrous synchronization protocols by short- (6 days), medium- (9 days) or long-term (12 days). Repositório Alice
VERGANI, G. B.; ARRAIS, A. M.; MELLO, M. R. B. de; DIAS, J. H.; SOUSA, M. A. P. de; MORAIS, M. C. da C.; FERREIRA, H. C.; BEVILAQUA, J. R.; OLIVEIRA, M. E. F.; SOUZA-FABJAN, J. M. G.; FONSECA, J. F. da.
Abstract: The variability of superovulatory responses is still a limiting factor for the consolidation of commercial embryo transfer programs in small ruminants (Bartlewski et al. 2016. Theriogenology, 86: 130-143). Superovulation protocols are traditionally performed with prior use of progesterone devices for short- or long-term duration (Oliveira et al. 2014. Anim Reprod Sci, 144: 30-37) associated exogenous FSH administration. The presence of dominant follicles in the ovary at the beginning of FSH treatment is detrimental to the growth of the other follicles, in addition, a greater number of antral follicles is required to have a bigger superovulatory response (Fonseca et al., 2010 Acta Sci Vet, 38: 337-369). In this context, the objective of this study...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Ovarian population; População ovariana; Ovino; Ovelha; Progesterona; Superovulação; Reprodução Animal; Transferência de Embrião; Sheep; Animal reproduction; Progesterone; Superovulation; Embryo transfer.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1112224
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In vivo embryo production in Brazilian naturalized goats. Repositório Alice
DIAS, J. H.; VERGANI, G. B.; LIMA, M. S. D.; TEIXEIRA, D. I. A.; SILVA, K. de M.; MONTEIRO, A. W. U.; BATISTA, R. I. T. P.; OLIVEIRA, M. E. F.; SOUZA-FABJAN, J. M. G.; FONSECA, J. F. da.
Abstract: Multiple ovulation and embryo transfer (MOET) is one of the most interesting reproductive biotechniques to be used in order to allow a rapid progression in the number of offspring per female. However, it is an underutilized reproductive biotechnology due to the variability of superovulatory response found and the high cost (Baldassare e Karatzas, 2004. AnimReprod Sci, 82/83:255-266). Brazilian naturalized breeds have socio-economic regional importance, but there is no studies reporting the effectiveness of in vivo embryo production on these animals. Thus, the aim of this study was to assess the efficiency of superovulation and viable embryo yield in Canindé and Moxotó goats raised and managed in different places. It is concluded that the in vivo...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Embryo recovery; PIV; Recuperação de embriões; MOET; Caprino; Cabra; Transferência de Embrião; Reprodução Animal; Goats; Embryo transfer; Animal reproduction.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1112208
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Induction of synchronous estrus in Morada Nova ewes: effects of distinct progestagen duration regimen and non-surgical embryo recovery as a tool to access efficiency measurements. Repositório Alice
ARRAIS, L. P. A. M.; MELLO, N. R. B. de; VERGANI, G. B.; ESTEVES, S. N.; BARBOSA, N. O.; CARVALHO, B. P.; DIAS, J. H.; OLIVEIRA, M. E. F.; FONSECA, J. F. da.
Abstract: In this context, the objective of this study was to evaluate the efficiency different synchronous estrus induction and NSER as additional tool to evaluate the results these protocols in pluriparous Morada Nova ewes. A total of 18 pluriparous sheep were divided into three treatment groups with 6 (T6, n=6), 9 (T9, n=6) and 12 (T12, n=6) days of 60 mg of medroxyprogesterone acetate (Progespon®, Zoetis, Campinas, São Paulo, Brazil). The NSER mean duration was 27.6±1.4 min, with recovery of 99.8% of injected fluid and embryo recovery rate of 62.97% (17/27). These preliminary results indicated that all protocols provided similar results and that NSER can be successfully performed and used as additional toll in synchronous estrous induced Morada Nova...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Ovino; Ovelha; Reprodução Animal; Superovulação; Progesterona; Transferência de Embrião; Sheep; Small ruminants; Superovulation; Progesterone; Embryo transfer.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1112197
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Is the vascularization percentage of the corpora lutea during the initial luteal phase affected by the dose of pFSH used in the superovulatory treatment of sheep?. Repositório Alice
BEVILAQUA, J. R.; FERREIRA, H. C.; VERGANI, G. B.; RODRIGUES, M. A. F.; MACIEL, G. S.; RODRIGUEZ, M. G. K.; RODRIGUES, N. N.; FONSECA, J. F. da; OLIVEIRA, M. E. F. de.
Abstract: The in vivo production of embryos is used to accelerate the multiplication of the herds, but the efficiency of this biotechnology is widely variable in small ruminants. The variability of the superovulatory responses and the production of viable embryos has been related to several factors, including the dose of gonadotrophin used in the hormonal treatment of superovulation, and the occurrence of prematurely regressing corpora lutea. In this context, the present study was performed to evaluate the effect of different doses of pFSH on the superovulatory response and vascularization percentage of the corpora lutea (CLs) formed. In conclusion, the vascularization percentage of the corpora lutea during the initial luteal phase is affected by the dose...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Corpora lutea; Ultrasound; Vascularization; Vascularização; Ovino; Ovelha; Reprodução Animal; Superovulação; Corpo Lúteo; Ultrassom; Ewes; Superovulation.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1112211
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Nonsurgical embryo recovery in Lacaune ewes superovulated with different doses of FSH. Repositório Alice
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: Resumo em anais de congresso (ALICE) 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
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Second step for non-surgical embryo transfer in sheep: Cervical transposing in diestrus nulliparous and pluriparous ewes. Repositório Alice
ARRAIS, A. M.; MELLO, M. R. B. de; VERGANI, G. B.; ESTEVES, E. N.; GARCIA, A. R.; PEREIRA, V. S. do A.; PRELLWITZ, L.; OLIVEIRA, M. E. F.; SOUZA-FABJAN, J. M. G.; FONSECA, J. F. da.
Abstract: Transcervical transposition in sheep cannot be achieved without any cervical relaxation drug (Gusmão et al., 2007, RevBrasSaúdeProdAn, 8:1-10). The first step testing the viability of cervical relaxation protocol for transcervical embryo transfer in sheep is to check the effect of these drugs on pregnancy. Although combination of estradiol benzoate and oxytocin did not compromise pregnancy establishment, no attempts of cervical transposition was reported in sheep (Lewis, 2010. SheepGoatResJ, 25:21-25). In Brazilian conditions, preliminary study showed that association of hCG with E2-OT association given at expected times for embryo transfer appeared not disturbing pregnancy (Arrais et al., 2018. AnimRep, 15:338), but cervical transposition was...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Receptoras; Inovulação não-cirúrgica; Recipients; Non-surgical inovulation; Ovino; Transferência de Embrião; Reprodução Animal; Sheep; Ewes.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1112209
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Second step for non-surgical embryotransfer in sheep: cervical transposing in diestrus nulliparous and pluriparous ewes. Repositório Alice
ARRAIS, A. M.; MELLO, M. R. B. de; VERGANI, G. B.; ESTEVES, S. N.; GARCIA, A. R.; PEREIRA, V. S. do A.; PRELLWITZ, L.; OLIVEIRA, M. E. F.; SOUZA-FABJAN, J. M. G.; FONSECA, J. F. da.
Transcervical transposition in sheep cannot be achieved without any cervical relaxation drug (Gusmaoet al., 2007, RevBrasSatideProdAn, 8:1-10). The first step testing the viability of cervical relaxation protocol for transcervical embryo transfer in sheep is to check the effect of these drugs on pregnancy.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Pequenos ruminantes; Inovulação não-cirúrgica; Receptoras; Non-surgical inovulation; Recipients; Small ruminants.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1116642
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Superovulation of Morada Nova Ewes with protocols diverging only progestagem duration regimen. Repositório Alice
ARRAIS, A. M.; MELLO, M. R. B. de; VERGANI, G. B.; FIGUEIRA, L. M.; SOUSA, M. A. P. de; CARVALHO, B. P.; ROMANELLO, N.; PRELLWITZ, L.; SOUZA-FABJAN, J. M. G.; FONSECA, J. F. da.
Abstract: Despite the importance of Morada Nova for Northeast sheep production systems, information about embryo production of this breed is scarce with only one report of multiple ovulation and surgical embryo recovery (Brasil et al., 2016. ArqBrasMedVetZootec, 68:1390-1394) and non-surgical uterine access (Fonseca et al., 2016. Theriogenology, 86:144-151). In this context, the objective of this study was to evaluate the efficiency of different superovulation protocols in pluriparous Morada Nova using nonsurgical embryo recovery (NSER) to access embryo production. [Superovulação de ovelhas Morada Nova com protocolos divergentes apenas do regime de duração da progestágeno].
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Ovino; Ovelha; Reprodução Animal.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1112203
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The use of human chorionic gonadotropin seven days after synchronized estrus for the increase of luteal tissue in Morada Nova ewes. Repositório Alice
VERGANI, G. B.; TREVIZAN, J. T.; PEREIRA, V. S. do A.; FONSECA, J. F. da; GARCIA, A. R.; ESTEVES, S. N.; OLIVEIRA, M. E. F..
The study was performed to evaluate whether the use of hCG 7 days after synchronized oestrus in Morada Nova ewes would increase the number and size of corpora lutea. In conclusion, 300 IU of hCG injected 7 days after synchronized oestrus is effective to increase the number of corpora lutea and in the size of luteal tissue. Despite indications of a favourable effect on luteal dynamics, the effects on progesterone production and conception rate need to be examined.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Ovino; Ovelha; Corpo Lúteo; Progesterona; Ciclo Estral; Sheep; Ewes; Estrus synchronization; Corpus luteum hormones; Progesterone; Estrous cycle.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1111137
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The use of human chorionic gonadotropin seven days after synchronized estrus for the increase of luteal tissue in Morada Nova ewes. Repositório Alice
VERGANI, G. B.; TREVIZAN, J. T.; PEREIRA, V. S. do A.; FONSECA, J. F. da; GARCIA, A. R.; ESTEVES, S. N.; OLIVEIRA, M. E. F..
The study was performed to evaluate whether the use of hCG 7 days after synchronized oestrus in Morada Nova ewes would increase the number and size of corpora lutea. In conclusion, 300 IU of hCG injected 7 days after synchronized oestrus is effective to increase the number of corpora lutea and in the size of luteal tissue. Despite indications of a favourable effect on luteal dynamics, the effects on progesterone production and conception rate need to be examined.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Ovino; Ovelha; Corpo Lúteo; Progesterona; Ciclo Estral; Sheep; Ewes; Estrus synchronization; Corpus luteum hormones; Progesterone; Estrous cycle.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1111121
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Vaginal cytology as a tool to predict the time of ovulation in goats and sheep. Repositório Alice
BRAIR, V. L.; SCHMIDT, A. P. P.; FIGUEIRA, L. M.; VERGANI, G. B.; DIÓGENES, Y. P.; RANGEL, P. S. C.; SOUZA-FABJAN, J. M. G.; FONSECA, J. F. da.
The detection of ovulation is of great importance for the use of reproductive biotechnologies in small ruminants. The ovulation is efficiently determined by ultrasound (US), equipment that is not always available and of relatively high cost. Therefore, the aim of this study was to identify the efficacy of vaginal cytology as a tool to determine the ovulation time in these species. The study was carried out during the non-breeding season, in Coronel Pacheco, Minas Gerais (21°35'S and 43°15'W). In sheep, the standard chosen was anucleated, but it had a high CV (23.7%), which led to non-high accuracy (66.7%). Therefore, PPV and NPV were 26% and 88%, respectively; the specificity was 45% and 64% at 24 h and 12 h before ovulation respectively; and finally, the...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Ovarian echography; Citologia vaginal; Ovino; Caprino; Reprodução Animal; Ovulação; Citologia; Goats; Sheep; Ewes; Animal reproduction; Ovulation; Ultrasonography; Vaginal mucosa.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1095108
Registros recuperados: 16
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