Ovarian responses in Bos indicus heifers treated to synchronise ovulation with intravaginal progesterone releasing devices, oestradiol benzoate, prostaglandin F2α and equine chorionic gonadotrophin

Butler, S. A. A.; Phillips, Nancy J.; Boe-Hansen, G.; Bó, G. A.; Burns, B. M.; Dawson, Karin J.; McGowan, Michael

doi:10.1016/j.anireprosci.2011.11.001

Cited by 17 publications

(12 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Cows were randomly allocated to receive either chilled‐stored or cryopreserved semen from either Bull A, B or C according to paddock, lactation status, the presence of a CL and BCS recorded on Day 0. The selected cows were submitted to an ovulation synchronization protocol (Butler et al., ). On Day 0, cows had an intravaginal progesterone‐releasing device (IPRD; Cue‐Mate ® ; 1.56 g P4; Bioniche Animal Health, Aust/Asia, Sydney, NSW, Australia) inserted intravaginally and received 2 mg oestradiol benzoate (ODB; BomerolTM, Bayer Australia, Sydney, NSW, Australia) im.…”

Section: Methodsmentioning

confidence: 99%

Investigation of in vitro measurable sperm attributes and their influence on electroejaculated bull semen with a fixed‐time artificial insemination protocol in AustralianBos indicuscattle

Satake

Edwards

Tutt

et al. 2017

Reprod Domestic Animals

View full text Add to dashboard Cite

Increasing use of fixed-time artificial insemination (FTAI) in beef cattle production has presented an opportunity for the use of fresh or chilled semen as an alternative to standard cryopreserved semen. The objective of this study was to examine in vitro sperm function and pregnancy rate of electroejaculated semen, chilled and stored for 48 hr, compared to conventionally cryopreserved semen with an optimized FTAI protocol in Brahman cattle. Semen from three Brahman bulls was collected, and aliquots were extended in either chilled (at 5°C) or frozen (LN ) in a Tris-egg yolk extender base with 2.4% or 7.0% glycerol, respectively. Semen samples were assessed 48 hr after collection or post-thaw and warming, for sperm motility, in vitro sperm function and fertilizing ability, and used in a FTAI programme. The overall pregnancy rates was significantly different (p < .01) after FTAI with frozen (n = 173; 53.2%) and chilled semen (n = 174; 31.6%). In contrast, the in vitro sperm assessment showed that the chilled semen had significantly faster motility (p < .05), a higher proportion of progressively motile spermatozoa (p < .05), with significantly higher proportions of acrosome intact, viable spermatozoa (p < .01). This study showed that reasonable pregnancy rates in Brahman cattle can be achieved using FTAI with chilled semen collected using electroejaculation and stored for up to 48 hr. However, improvements in semen extenders are required in consideration of semen collection method to improve the longevity of sperm fertilizing ability to significantly increase FTAI output using chilled storage of bull semen.

show abstract

Section: Methodsmentioning

confidence: 99%

Investigation of in vitro measurable sperm attributes and their influence on electroejaculated bull semen with a fixed‐time artificial insemination protocol in AustralianBos indicuscattle

Satake

Edwards

Tutt

et al. 2017

Reprod Domestic Animals

View full text Add to dashboard Cite

show abstract

“…Portanto, no modelo multivariável os parâmetros que predizem melhor o sucesso gestacional ficam retidos no modelo. achado, demonstrando pouco efeito do ECC na taxa de prenhez após IATF de novilhas taurinas (BUTLER et al, 2011;MCKINNISS et al, 2011) e zebuínas (SÁ FILHO et al, 2015). Ainda, no presente estudo, a utilização da eCG no momento da remoção do implante auricular pode ter reduzido o possível efeito da condição corporal sobre o sucesso gestacional, conforme descrito por SÁ FILHO et al (2015).…”

Section: Taxa De Prenhezunclassified

<b>Influência do desenvolvimento corporal na resposta aos programas de sincronização para inseminação artificial em tempo fixo em novilhas Nelore de 14 meses de idade</b>

Freitas¹

View full text Add to dashboard Cite

Aos meus pais, Jorge Baptista de Freitas e Célia Gonzalez de Freitas e ao meu querido irmão, Rodrigo Gonzalez de Freitas, por me apoiar, entender e sempre retirar as pedras do caminho, com amor e carinho incondicionais. Orgulho de fazer parte dessa família que se ama.À minha namorada, Bruna Martins Guerreiro, minha parceira, alma gêmea e grande amor, sempre dividindo as alegrias e tristezas.Ao prof. Dr. Pietro Sampaio Baruselli, por enxergar o profissional que existe aqui dentro, e por ser meu exemplo de humildade, trabalho e dedicação.Ao prof. Dr. José Antônio Visintin, por me ensinar o que significa vestir a camisa e lutar pelos ideais. Por sempre cuidar e ter feito eu me apaixonar pela minha segunda casa, a FMVZ-USP. Dedico AgradeçoSe existe algo pelo que agradecer, seria a chance que me deram de poder sempre encontrar pelo caminho todas essas pessoas maravilhosas... obrigado Deus.À minha mãe, por ser essa pessoa sensacional. Por sempre pegar na minha mão e me dar forças para passar pelas dificuldades... por fazer eu sentir que nada, nada nesse mundo pode me impedir de conquistar meus sonhos... mãe, eu te amo.Ao meu pai, por ser o meu super-herói, por me ensinar tudo sobre a vida, por me entender e sempre me dar o apoio que eu preciso, por me ajudar nas escolhas mais difíceis e me ensinar a ser o homem que hoje eu sou.... pai, eu te amo.Ao meu irmão, por ter sido meu companheiro desde que veio ao mundo, por fazer eu ter orgulho de ter um irmão mais novo que tem a visão de negócio que nunca terei na vida. Por ser esse cara tão especial.... Digo, eu te amo.A toda a minha família (Tata, Tio Cacá, Laurinha, Titi, Madrinha, Vó Maria, vô Noé, Tio Rui, Tia Sílivia, Baguete, Gabi, Tio Marcelo, Tia Macarena, Marimar, Juli, Tia Su, Tio Tuim, Sandra) por ser meu chão, meu alicerce. Por sempre acreditar em mim, por passar por todo problema de família, mas no fundo nunca deixar de ser uma... Aos que nos deixaram pelo caminho, mas que onde quer que estejam estão aí, olhando por nós... especialmente ao vô Pepe, que deixou saudades, e que fazia a melhor empanada de calabresa do Universo.... À minha Buni. Parceira. Amor de alma. Sem você essa dissertação estaria longe de ser concluída... saiba que você veio como um furacão, e é fundamental na minha vida. Por todos os momentos que passamos juntos, pelos carinhos e amor, e simplesmente por você ser essa pessoa doce que cativa a todos por onde quer que passe... meu orgulho. Você me faz sentir o cara mais feliz do mundo, pois tenho você ao meu lado, meu apoio de todas as horas... Buni, eu te amo.Ao grande Mestre, prof. Pietro, que é um exemplo de honestidade, humildade e dedicação. Que realmente é um mestre, enxergando o potencial de cada um, estimulando sempre a sermos pessoas melhores... todos que pelo seu grupo passam saem diferentes e fazem a diferença. Prof., sempre terei orgulho de ter participado dessa grande família, os Pietrinhos/Pietrossauros.Aos companheiros de Brooks Agropecuária, e ao M.V. Rodrigo Quirino, por ter me ensinado como é o dia-a-dia do campo e os princípi...

show abstract

“…Heifers (n=24) were selected to synchronise oestrus according to an optimised protocol (Butler et al, 2011). This protocol is already described in detail in Chapter 2 (Synchronisation of oestrus)…”

Section: Synchronisation Of Oestrusmentioning

confidence: 99%

“…Non-pregnant animals were selected to synchronise oestrus according to a protocol used by Butler et al (2011). Briefly, at Day -9 oestradiol benzoate (1mg, Cidirol®, Genetics, Australia) was were enrolled into this study.…”

Section: Synchronisation Of Oestrusmentioning

confidence: 99%

See 1 more Smart Citation

Effect of endometrial biopsy on uterine health in tropically adapted beef cattle

Garzon¹,

Orlando²

View full text Add to dashboard Cite

In cattle, early embryonic loss during the first two to three weeks after fertilisation is recognised as the major cause of reproductive failure, with consequent significant impacts on business performance of beef and dairy farms. Inadequate endometrial receptivity is considered an important cause of early embryonic mortality in cattle. A pilot experiment was conducted to compare the outcome of performing different endometrial sampling procedures in tropically adapted (Bos indicus x Bos taurus) heifers, and to select the most suitable method to collect samples for investigation of endometrial gene expression. Endometrial biopsy (EB) using a biopsy device with a diameter similar to an artificial insemination gun (10366L Karl Storz®, Germany) was found to be the most reliable method of collecting endometrial samples in these heifers, with the samples recovered yielding a mean concentration of RNA of 72.9 ±39.3 ng/µl and mean RNA integrity number (RIN) of 7.3 ±1.1.To assess the likely safety of conducting EB in cattle a systematic review of published information assessing the impact of EB on subsequent pregnancy rates was conducted. Using the Preferred Reporting Items for Systematic reviews and Meta-Analysis (PRISMA) protocol, online searches identified 1164 possible studies. After applying the exclusion criteria, six studies allowed the comparison of pregnancy rates between sampled (n= 1,208) and non-sampled cows (n=2,393). The results showed that EB can be performed before breeding without adversely affecting the likelihood of cows becoming pregnant.A major objective of the research was to determine whether EB and evaluation of endometrial gene expression could be used to identify tropically adapted embryo transfer (ET) recipients more likely to become pregnant. Three potential EB scenarios were investigated, 1) EB on Day 7 of the oestrous cycle prior to the cycle when ET would be performed, 2) EB on Day 4 of the oestrous cycle in which ET would be performed i.e. EB 3 days before ET, and 3) EB on the same day when ET would be performed.The first study assessed the morphological and inflammatory changes induced by endometrial biopsy. Pre-synchronised heifers underwent EB from the horn ipsilateral to the corpus luteum (CL) either at Day 7 of the previous cycle (Group 1 n=10) followed by administration of a luteolytic dose of prostaglandin F2α or at Day 4 (Group 2, n=7) of the present cycle. All heifers were slaughtered on Day 7 of the present cycle. The site of EB was visually evident in 40% (4/10) of Group 1 and 42% (3/7) of Group 2 heifers. Histological assessment revealed no evidence of changes indicative of endometritis in either the biopsied or non-biopsied horns in both groups. The histological iii changes observed included mild mononuclear infiltration of the epithelium and mild vascular changes associated with haemorrhage and congestion.Initial investigation of the endometrial expression of the pro-inflammatory cytokine IL1β and wound healing cytokine TGFβ genes found no significant difference betwe...

show abstract

Ovarian responses in Bos indicus heifers treated to synchronise ovulation with intravaginal progesterone releasing devices, oestradiol benzoate, prostaglandin F2α and equine chorionic gonadotrophin

Cited by 17 publications

References 28 publications

Investigation of in vitro measurable sperm attributes and their influence on electroejaculated bull semen with a fixed‐time artificial insemination protocol in AustralianBos indicuscattle

Investigation of in vitro measurable sperm attributes and their influence on electroejaculated bull semen with a fixed‐time artificial insemination protocol in AustralianBos indicuscattle

<b>Influência do desenvolvimento corporal na resposta aos programas de sincronização para inseminação artificial em tempo fixo em novilhas Nelore de 14 meses de idade</b>

Effect of endometrial biopsy on uterine health in tropically adapted beef cattle

Contact Info

Product

Resources

About