Embryo Transfer Efficiency of Quarter Horse Athletic Mares

Pessoa, Marcelo A.; Cannizza, André P.; Reghini, Maria Fernanda Svizzero; Alvarenga, Marco Antônio

doi:10.1016/j.jevs.2011.06.001

Cited by 12 publications

(15 citation statements)

References 5 publications

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“…In contrast with previous reports, the present results showed no significant differences in PR 15 days after ET between aged and younger mares (Pickett et al, 1987;Vogelsang and Vogelsang, 1989;Squires et al, 1999Squires et al, , 2003Stout, 2006;Losinno et al, 2008;Mortensen et al, 2009;Atwood and Bowen, 2011;Pessoa et al, 2011). This could be explained, at least in part, because of a vast majority of equine embryos recovered in the present study were of good morphological quality (>90% grade 1 or 2).…”

Section: Discussioncontrasting

confidence: 99%

The effect of mare's age on multiple ovulation rate, embryo recovery, post-transfer pregnancy rate, and interovulatory interval in a commercial embryo transfer program in Argentina

Marinone

Losinno

Fumuso

et al. 2015

Animal Reproduction Science

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Section: Discussioncontrasting

confidence: 99%

The effect of mare's age on multiple ovulation rate, embryo recovery, post-transfer pregnancy rate, and interovulatory interval in a commercial embryo transfer program in Argentina

Marinone

Losinno

Fumuso

et al. 2015

Animal Reproduction Science

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“…The effect of exercise on ET outcome previous studies is controversial: it has been reported to lower embryo recovery [56,57] or to have no effect on embryo recovery and pregnancy rates after transfer [39]. In our clinical experience [34] embryo recovery rate was not affected by sport activity, and the results of the current study on pregnancies after transfer seem to indicate that mares performing sport activity should not be discriminated as embryo donors.…”

Section: Discussionmentioning

confidence: 39%

“…Which is the probability to have a foal is the first question an owner asks before deciding if to include or not his mare into an ET program. There is plenty of literature about foaling rates, especially in the Thoroughbred [4,11,21,[26][27][28][29][30][31][32]34], but, in spite of many reports on thousand of recipients pregnancy rates up to 40-50 days [2][3][4][5][6]15,38,39], only one study describes foaling rates following embryo transfer in the mare [33].…”

Section: Discussionmentioning

confidence: 99%

Factors Affecting Recipients' Pregnancy, Pregnancy Loss, and Foaling Rates in a Commercial Equine Embryo Transfer Program

Panzani

Vannozzi

Marmorini³

et al. 2016

Journal of Equine Veterinary Science

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During 11 breeding seasons, 351 seven to ten days old horse embryos were non-surgically transferred into recipients that ovulated between 3 and 10 days earlier. Pregnancy rates at 14 and 40 days and foaling rates were 77.8% (273/351), 69.2% (243/351) and 64.4% (226/351), respectively. Pregnancy loss between 14 and 40 days was 11% and between 40 days and delivery was 7%. The transfer of quality grade 3-4 embryos resulted in a significantly lower pregnancy rate at 14 days compared to the transfer of grade 1-2 embryos (46.2% vs 79%; P<0.05). Eight days old embryos resulted in significantly lower pregnancy losses than day 9 or 10 embryos, as occurred for embryos between 400 and 1200µm compared to embryos smaller than 400µm. Embryos recovered from mares older than 20 years resulted in a significantly higher pregnancy loss rate than those recovered from younger mares. The same happened for embryos coming from mares affected by reproductive pathologies compared to healthy mares performing sport activity. None of the evaluated parameters influenced significantly recipients' foaling rate.

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“…POFs have been extensively used in breeding protocols. Employing POFs in biotechniques such as artificial insemination [AVANZI et al, 2015], embryo transfer [PESSOA et al, 2011], intracytoplasmic injection of spermatozoa [SESSIONS-BRESNAHAN et al, 2014], and use of sexed semen [SAMPER et al, 2012] has led to considerable advancements in the areas of reproductive physiology, gametogenesis, and embryogenesis [AURICH, 2012].…”

Section: Introductionmentioning

confidence: 99%

Follicle Populations in Mare Ovaries: From Preantral to Preovulatory Follicles

Leonel¹,

Bento-Silva²,

Silva³

et al. 2015

Enciclopédia Biosfera

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The purpose of this study was to describe morphological and quantitative aspects of preantral and antral follicles in the equine ovary. Six ovaries were collected from necropsied mares and sliced lengthwise parallel to the ovulation fossa. The slices were fixed and processed for histological evaluation under light microscopy. Preantral follicles were classified according to developmental stage and as morphologically normal or degenerated. Also, another 183 ovaries were obtained from an abattoir. From these ovaries, antral follicles were measured, punctured and oocytes evaluated. Oocyte recovery rates were calculated for each follicle size category. A total of 490 preantral follicles were examined. Primary follicles were in greater number than primordial follicles. No secondary follicles were identified. A total of 518 antral follicles were punctured and evaluated. Total oocyte recovery rate from antral follicles was 47.6. In conclusion, preantral follicles consist of a scarce source in the equine ovary. Antral follicles oocyte recovery rate was higher for smaller-diameter antral follicles.

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Embryo Transfer Efficiency of Quarter Horse Athletic Mares

Cited by 12 publications

References 5 publications

The effect of mare's age on multiple ovulation rate, embryo recovery, post-transfer pregnancy rate, and interovulatory interval in a commercial embryo transfer program in Argentina

The effect of mare's age on multiple ovulation rate, embryo recovery, post-transfer pregnancy rate, and interovulatory interval in a commercial embryo transfer program in Argentina

Factors Affecting Recipients' Pregnancy, Pregnancy Loss, and Foaling Rates in a Commercial Equine Embryo Transfer Program

Follicle Populations in Mare Ovaries: From Preantral to Preovulatory Follicles

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