The current status of equine embryo transfer

Squires, E.L.; McCue, Patrick M.; Vanderwall, Dirk K.

doi:10.1016/s0093-691x(98)00234-9

Cited by 118 publications

(105 citation statements)

References 36 publications

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“…In the present study, the pregnancy rate obtained (47.51%) was lower than the ones reported using nonsurgical transcervical embryo transfer, such as 70% (Squires et al, 1999), 82.9% (Foss et al, 1999), 65.7% (Carnevale et al, 2000, 74.9% (Fleury et al, 2001) and 82.5% (Jasko, 2002). It is known that the proper management of recipients is the major factor for success in embryo transfer programs (Squires et al, 1999;Losinno & Alvarenga, 2006).…”

Section: Resultscontrasting

confidence: 68%

“…It is known that the proper management of recipients is the major factor for success in embryo transfer programs (Squires et al, 1999;Losinno & Alvarenga, 2006). The low recipient:donor ratio in this study might have been responsible for the unsatisfactory pregnancy rates obtained, making recipient selection harder.…”

Section: Resultsmentioning

confidence: 99%

“…On the eight day post-ovulation, embryos were recovered using the method described by Squires et al (1999). At the end of the embryo recovery uterine flush, mares were intramuscularly injected with 10 miligrams (mg) of dinoprost tromethamine (Lutalyse ® -Pfizer Saúde Animal, São Paulo, SP, Brazil).…”

Section: Methodsmentioning

confidence: 99%

“…Nowadays, Brazil is one of the main countries in number of annual successful transfers (Losinno & Alvarenga, 2006). It is known that success rates after an embryo transfer procedure are affected by many factors such as those related to donors and recipients, semen used, embryo quality, manipulation and storage, transfer technique and climatic conditions (Squires et al, 1999;Carnevale et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

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Use of long-acting progesterone to acyclic embryo recipient mares

et al. 2012

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-The objective of this study was to evaluate the efficiency of cyclic and acyclic progesterone-treated recipient mares in a commercial embryo transfer program. Acyclic recipients were treated with decreasing amounts of estradiol cypionate (ECP ® -Pfizer Saúde Animal, São Paulo, Brazil), followed by 1500 mg of a sustained-release progesterone injection (P4LA150 ® -Laboratórios B.E.T., Rio de Janeiro, Brazil). Out of all 1506 embryo recovery attempts performed, 59.36%were positive (894/1506). Pregnancy rates of cyclic and acyclic mares were, respectively, 44.12% (319/723) and 57.68%(139/241) -higher in acyclic recipients under progesterone treatment. Embryo loss was similar between groups (9.72% -31/319 vs. 11.51% -16/139). When fertility data on acyclic mares treated with long-action progesterone were grouped in relation to the interval of the beginning of the treatment with progesterone to the embryo transfer, there was no difference in pregnancy rates at 12 days (51.28% -20/39; 58.92% -33/56; 60.52% -46/76 and 58.57% -41/70 for embryos transferred 3 (P3), 4 (P4), 5 (P5) and 6 (P6) days after the beginning of the treatment with progesterone). Groups P3, P4, P5 and P6showed embryo loss rates of 20.00% (4/20), 12.12% (4/33), 2.17% (1/46) and 17.07% (7/41), respectively. These rates were similar in groups P3, P4 and P6. Pregnant recipients submitted to an embryo transferring procedure on P5 showed lower embryo mortality rates than on P3 and P6. P4 recipients tended to suffer higher embryo mortality rates than P5. Acyclic recipient mares under progesterone treatment can be satisfactoryly used in embryo transfer programs.

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Section: Resultscontrasting

confidence: 68%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Use of long-acting progesterone to acyclic embryo recipient mares

et al. 2012

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“…As taxas obtidas corroboram as encontradas em trabalhos recentes da literatura para transferência não-cirúrgica de embriões eqüinos a fresco: Squires et al (1998) obtiveram 69 a 89%; Jasko (2002), 62,5 a 100%; Carney et al (1991), 60 a 71%; e Carnevale et al (2000), 65,7% de prenhez. Apesar dos valores não-significativos (P>0,05), entre as éguas inovuladas no D2, verificou-se 52,38% de prenhez naquelas tratadas com Altrenogest e 30% naquelas não tratadas com progestágeno.…”

Section: Figure 1 -Percentage Of Undesirable Characteristics Of the Gunclassified

Tratamento de éguas receptoras de embriões visando sua utilização no segundo dia pós-ovulação

Caiado¹,

Fonseca²,

Silva³

et al. 2007

R. Bras. Zootec.

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Durante as estações de monta de 2001/2002 e 2002/2003, 43 éguas da raça Mangalarga Marchador receptoras de embriões foram tratadas aleatoriamente, via intramuscular, com 200 mg/dia de progesterona oleosa (P4) e 41 éguas da mesma raça receberam 0,044 mg/kg/dia de Altrenogest, aleatoriamente, via oral. Ambos os tratamentos foram efetuados entre D0 (dia da ovulação) e D5. As receptoras foram avaliadas no D2 e, se consideradas aptas, foram inovuladas. Dois grupos de 85 éguas da mesma raça foram utilizados aleatoriamente como controle e não receberam progestágeno, mas foram avaliados e inovulados em D2 ou D5, se considerados aptos. Os grupos D2 com P4 e D5 sem progestágeno tiveram maior número de éguas consideradas excelentes ou boas (aptas) no momento da avaliação, 55 (64,71%) e 25 (65,12%), respectivamente. O grupo D2 com Altrenogest apresentou número estatisticamente igual de receptoras aptas a inovulação e descartadas (20 e 21 éguas, respectivamente) no momento da avaliação. Nesta avaliação, no grupo D2 sem progestágeno, a quantidade de receptoras descartadas foi significativamente maior. A taxa de prenhez foi maior nos grupos D2 com P4 e D5 sem progestágeno (72,72 e 76,36%, respectivamente). No grupo D2 com Altrenogest, obteve-se taxa de prenhez de 52,38%, não-significativa, e, no grupo D2 sem progestágeno, a quantidade de éguas não-gestantes foi maior, embora não-significativa. O tratamento com P4 do D0 ao D5 possibilita antecipar a inovulação de receptoras para D2, com resultados semelhantes ao D5.

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Embryo Transfer andin vitroFertilization

Hasler¹

2007

Comparative Reproductive Biology

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The current status of equine embryo transfer

Cited by 118 publications

References 36 publications

Use of long-acting progesterone to acyclic embryo recipient mares

Use of long-acting progesterone to acyclic embryo recipient mares

Tratamento de éguas receptoras de embriões visando sua utilização no segundo dia pós-ovulação

Embryo Transfer andin vitroFertilization

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