Document Detail

Cryopreservation of Equine Embryos: Current State-of-the-Art.
MedLine Citation:
PMID:  22681302     Owner:  NLM     Status:  In-Data-Review    
During the past 15 years, embryo transfer (ET) has become increasingly widespread within the sport-horse breeding industry. At present, however, the vast majority (>95%) of horse embryos are transferred fresh or after chilled storage for up to 24 h, whereas cryopreservation is rarely employed despite its obvious potential for simplifying recipient mare management and facilitating long-term storage and international transport of embryos. A number of inter-related factors have contributed to the slow development and implementation of equine embryo cryopreservation, and these include the following: (i) the absence of commercially available products for reliably stimulating superovulation; (ii) very poor pregnancy rates following cryopreservation of embryos >300 μm in diameter; (iii) difficulty in recovering embryos at early developmental stages amenable to cryopreservation; and (iv) interembryo variation in susceptibility to cryodamage. However, acceptable success rates (>55% pregnancy) have been reported for both slow-frozen and vitrified small embryos (<300 μm), and there is renewed interest in cryopreservation, not only in the context of standard ET programmes, but also because it would facilitate pre-implantation genetic testing and allow wider access to techniques for producing embryos in vitro, such as intracytoplasmic sperm injection and nuclear transfer. This article will review the current status of equine embryo cryopreservation.
Tae Stout
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Reproduction in domestic animals = Zuchthygiene     Volume:  47 Suppl 3     ISSN:  1439-0531     ISO Abbreviation:  Reprod. Domest. Anim.     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-06-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9015668     Medline TA:  Reprod Domest Anim     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  84-9     Citation Subset:  IM    
Copyright Information:
© 2012 Blackwell Verlag GmbH.
Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands Department of Production Animal Studies, University of Pretoria, Onderstepoort, Pretoria, South Africa.
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