Successful transfer of day 10 horse embryos: influence of donor-recipient asynchrony on embryo development

Reproduction : the Official Journal of the Society for the Study of Fertility
Sandra WilsherW R Allen

Abstract

A total of 78 day 10 horse embryos were transferred non-surgically to recipient mares that had ovulated 9, 7, 6, 5, 4, 3, 2 or 1 day after (negative asynchrony), on the same day (synchronous), or 2 or 4 days before (positive asynchrony) the donor (n=6 or 8 mares per group). Pregnancy rates between 100% (6/6) and 63% (5/8) were seen in recipient mares that were between +2 and -6 days asynchronous. Embryo survival to the heartbeat stage declined in recipients that were -7 days asynchronous and no embryos survived in recipients that were -9 days asynchronous. Irrespective of uterine asynchrony, cessation of embryo mobility and fixation at the base of a uterine horn occurred when the conceptus was approximately 17 days old. Conceptus growth and development was slowed when embryos were placed in negatively asynchronous uteri. At the greatest degree of negative asynchrony at which embryos survived to the heartbeat stage, i.e. -7 and -6 days, development of the embryo proper and allantois was retarded. Luteostasis was achieved in recipient mares when day 10 embryos were transferred to recipient mares at any stage of asynchrony between -9 and +2 days with respect to the donor. These results indicate that in the horse, there is a wide w...Continue Reading

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Dec 17, 2008·Reproduction : the Official Journal of the Society for the Study of Fertility·Sandra Wilsher, W R Allen

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Citations

Sep 21, 2013·Reproductive Biology and Endocrinology : RB&E·Grazyna E PtakPasqualino Loi
Mar 20, 2012·PloS One·Grazyna E PtakPasqualino Loi
Nov 18, 2011·Reproduction : the Official Journal of the Society for the Study of Fertility·Katrien SmitsAnn Van Soom
Mar 10, 2012·Reproduction, Fertility, and Development·Keith J BetteridgeM Anthony Hayes
Dec 5, 2015·Journal of Animal Science and Biotechnology·Christine Aurich, Sven Budik
Sep 29, 2011·Equine Veterinary Journal·S WilsherW R Allen
May 19, 2012·Equine Veterinary Journal. Supplement·S Wilsher, W R Allen
Sep 19, 2015·Reproduction in Domestic Animals = Zuchthygiene·M de Ruijter-Villani, Tae Stout
Oct 19, 2012·Biology of Reproduction·Simone GebhardtStefan Bauersachs
Jun 16, 2018·Reproduction, Fertility, and Development·Charlotte GibsonTom A E Stout

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