Periódicos Brasileiros em Medicina Veterinária e Zootecnia

p. 385-390

Dinâmica folicular de vacas de corte tratadas com três protocolos de sincronização da ovulação

Melo, Luciano CavalheiroBeskow, AndreiSilva, Brunna Velho Costa eEvangelista, Giovana TagliariGregory, Joana WeberMarques, Pablo RochaJobim, Maria Inês MascarenhasMattos, Rodrigo CostaGregory, Ricardo Macedo

Artificial insemination is an established and viable technique to accelerate the genetic advancement and economic return of the cattle. However, compromises the efficiency of detection of estrus results in low insemination rates. To avoid these problems in beef herd, synchronization protocols have been developed that allow inseminate large number of animals within a set period of time. These treatments are known as protocols for synchronization of ovulation for fixed-time artificial insemination (FTAI). There are several slow-release progesterone or progestins devices on the market for use in synchronization of estrus/ovulation programs in cattle, but these devices have a high cost, which results in less use of these protocols by farmers . This study aimed to determine the follicular dynamic of a low cost protocol to synchronize ovulation, which uses vaginal sponges impregnated with medroxy-progesterone acetate (MPA; group 1) and compare it with two trade protocols (groups 2 and 3).(AU)

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