The pattern of embryonic fixation and its relationship to pregnancy loss in thoroughbred mares

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dc.contributor.author Sharma, S.
dc.contributor.author Davies-Morel, Mina Clare Gwynne
dc.contributor.author Dhaliwal, G. S.
dc.contributor.author Dadarwal, D.
dc.date.accessioned 2011-06-01T09:34:54Z
dc.date.available 2011-06-01T09:34:54Z
dc.date.issued 2009-10
dc.identifier.citation Sharma , S , Davies-Morel , M C G , Dhaliwal , G S & Dadarwal , D 2009 , ' The pattern of embryonic fixation and its relationship to pregnancy loss in thoroughbred mares ' Reproduction in Domestic Animals , vol 45 , no. 5 , pp. e61-67 . , 10.1111/j.1439-0531.2009.01523.x en
dc.identifier.issn 0936-6768
dc.identifier.other PURE: 162961
dc.identifier.other dspace: 2160/6863
dc.identifier.uri http://hdl.handle.net/2160/6863
dc.description Sharma, S., Davies Morel, M. C. G., Dhaliwal, G. S., Dadarwal, D. (2010). The pattern of embryonic fixation and its relationship to pregnancy loss in thoroughbred mares, Reproduction in Domestic Animals, 45, (5), e61-e67. Online early IMPF: 01.60 en
dc.description.abstract Ultrasonographic pregnancy records of 195 mares from six Thoroughbred stud farms, over a period of 7 years were retrospectively analysed to assess the effect of various factors on embryonic vesicle (EV) fixation pattern and pregnancy outcome. Of the total of 746 pregnancies analysed, significantly (p <0.01) more EV fixations were evident in the right uterine horn than in the left (53.35% vs 46.65% respectively). There was no significant effect of either, the side of ovulation, or age of the mare, on the side of EV fixation. However, EV fixation, was significantly (p <0.001) more likely to occur in the right uterine horn in maiden and barren mares (65.75% vs 57.45% respectively). The age and reproductive status of the mare as well as foal heat breeding failed to demonstrate a consistent effect on pregnancy loss relative to the side of EV fixation. In lactating and foal heat bred mares, EVs were significantly (p <0.0001) more frequently established in the contralateral horn to the one from which the mare delivered her most recent foal. In lactating mares, significantly (p <0.05) higher embryonic and pregnancy losses were observed in the ipsilateral horn. In conclusion, (a) side of EV fixation was (i) independent of the side of ovulation and mare age (ii) significantly (p <0.001) affected by reproductive status, (b) neither age of mare nor reproductive status had any effect on pregnancy loss rates relative to the side of EV fixation and (c) in lactating mares the EV had a greater chance of fixation and survival in the horn contralateral to the one from which the mare delivered her most recent foal. en
dc.language.iso eng
dc.relation.ispartof Reproduction in Domestic Animals en
dc.title The pattern of embryonic fixation and its relationship to pregnancy loss in thoroughbred mares en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1111/j.1439-0531.2009.01523.x
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en


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