Avanços na criopreservação de embriões equinos

• Autor(a) principal: Araujo, Carla Fredrichsen Moya [UNESP]
• Data de Publicação: 2010
• Outros Autores: Araújo, Gustavo Henrique Marques [UNESP], Meira, Cezinande de [UNESP]
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://www.cbra.org.br/portal/publicacoes/rbra/2010/rbrajm2010.html; http://hdl.handle.net/11449/141283
• topic: Cooling; Embryonic evaluation; Freezing; Mare; Vitrification; Avaliação embrionária; Congelação; Égua; Refrigeração; Vitrificação

The use of low temperature techniques to preserve embryos became essential at the actual level of the equine industry. The cooling, freezing, and vitrification are successful techniques applied on assisted reproduction for this specie. This review explores extensively the equine embryos cryopreservation aiming their transport during the ovulatory season. Furthermore, the utilization of freezing and vitrification aiming the storage and future use of embryos, and the production optimization in cases when a breeding season is determined by racing calendar are considered. Accomplishment of these techniques depends on the embryos diameter at the cryopreservation moment. Smaller embryos at early stages of development (<300µm) are more resistant to freezing or vitrification processes due to less amount of fluid present at the blastocoele and a not completed developed embryonary capsule, allowing a better cellular dehydration and consequently better posttransfer pregnancy rates.