Qualidade do sêmen e resultados em programas de IATF em bovinos.

• Autor(a) principal: NOGUEIRA, E.
• Data de Publicação: 2015
• Outros Autores: SILVA, C. S., SILVA, J. C. B., GARCIA, W. R., ANACHE, N. A., SILVA, K. C., POTIENS, J. R., SILVA, E. V. da C. e.
• Idioma: por
• Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
• Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1022239
• topic: Reprodução Animal; Inseminação Artificial; Sêmen; Artificial insemination; Animal reproduction

The ability to predict male fertility is highly desirable for bulls used in AI. Timed artificial insemination (TAI) represents a breakthrough in the use of AI in Brazil and other countries. Numerous causes contribute to the wide range of results and/or unsatisfactory pregnancy rates in TAI programs, highlighting the factors inherent in the bovine female in addition to several factors inherent to quality of semen used, and in regarding to it, differences reported in fertility could be attributed to variation in sperm qualitative characteristics. Consequently, the success of bovine AI programs largely depends on the use of good quality semen. When only high fertility bulls are used, better conception rates are achieved, reducing costs of reproductive programs. Thus, some authors have shown that semen used in TAI has great impact on pregnancy rates, and various biomarkers of sperm quality are required to predict the fertility of bull spermatozoa. We will discuss results in Brazilian TAI programs, and different methods of post thaw semen evaluation and relations with the P/AI cows to identify the candidate predictors of conception rate.