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Reproduction in Domestic Ruminants VIII

Reproduction in Domestic Ruminants VIII

Applied Reproductive Technology: Up-date

bp0008rdr34 | Applied Reproductive Technology: Up-date | REDR2014

Evolution in fixed-time: from synchronization of ovulation to improved fertility

Binelli Mario , Sartori Roberto , Vasconcelos José Luiz Moraes , Monteiro Pedro Leopoldo Jerônimo , Pereira Marcos Henrique Colombo , Ramos Roney S

Summary. Synchronization of ovulation and subsequent timed artificial insemination became a popular practice in modern, large scale, dairy and beef commercial operations. Popularity was because it became a serious option to eliminate a laborious and low efficiency activity in the industry: checking cows for heat. Synchronization protocols involve the sequential administration of reproductive hormones to manipulate the estrous cycle to provide a fertile oocyte ...

bp0008rdr35 | Applied Reproductive Technology: Up-date | REDR2014

Biological and practical lessons associated with the use of sexed semen

de Graaf Simon P , Leahy Tamara , Vishwanath Ramakrishnan

Summary. Numerous biological and practical lessons associated with the use of sexed semen have been learnt in the 15 years since it was released onto the commercial market. Over this time, concerns regarding the safety of sex-sorted spermatozoa have been largely allayed through the birth of several million pre-sexed calves, but the major issue that remains is that of reduced fertility. Numerous studies have demonstrated that the process of flow cytometric sort...