Sincroniza o do estro e da ovula o utilizando protocolos de curta dura o durante a pr谷-esta o reprodutiva em ovelhas Suffolk = Estrus and ovulation synchronization using short-term protocols during the previous reproductive season in Suffolk ewes

作者：Luciana Takada; Sony Dimas Bicudo; Carlos Frederico de Carvalho Rodrigues; Lia de Alencar Coelho

来源：Acta Scientiarum - Animal Sciences, 2009.

• Benzoato de estradiol
• eCG
• GnRH
• progesterona
• ultrassonografia
• Estradiol benzoate
• eCG
• GnRH
• progesterone
• ultrasound

Este trabalho foi realizado com o objetivo de estudar a efic芍cia do protocolo de curta dura o de sincroniza o do estro. As ovelhas foram divididas em quatro grupos: Grupo Controle (esponjas de MAP por 12 dias, e eCG na retirada); Os Grupos I, II e III permaneceram com a esponja por quatro dias e na retirada foi aplicado 100 g de PGF e adicionalmente: no Grupo I (0,1 mg de Benzoato de estradiol - BE na coloca o da esponja e 48h ap車s a retirada 50 g de GnRH); Grupo II (35 mg de progesterona injet芍vel e 0,1 mg de BE na coloca o da esponja e na retirada 400 UI de eCG e 50 g de GnRH 48h ap車s); Grupo III (35 mg de progesterona injet芍vel e 0,2 mg de BE na coloca o da esponja e na retirada 400 UI de eCG e 50 g de GnRH 56h ap車s). Foram feitos exames de ultrassom, dosagens de progesterona, e observa es do in赤cio do estro e da ovula o. A falta do eCG no Grupo I fez com que esse protocolo fosse menos eficaz na indu o e sincroniza o do estro e ovula o. O Grupo Controle teve maior sincronia do estro e da ovula o. This study was carried out with the objective of examining the effect of the short-term estrus synchronization protocol. Ewes were divided in four groups: Control Group (MAP sponges for 12 days, and eCG at withdrawal); Groups I, II and III used the sponge for four days, and 100 g of PGF was applied at withdrawal; and additionally, Group I (0.1 mg of Estradiol benzoate - EB, in the sponge placement, and in the withdrawn 400 UI of eCG and 50 g of GnRH 48h later); Group II (35 mg of injectable progesterone and 0.1 mg of EB in the sponge placement, and 400 UI of eCG at withdrawal, and 50 g of GnRH 48h after); Group III (35 mg of injectable progesterone and 0.2 mg of EB in the sponge placement, and 400 UI of eCG at withdrawal, and 50 g of GnRH 56h after). Exams were accomplished for ultrasound and determine the plasmatic concentrations of progesterone and observations of the beginning the estrus and the ovulation. The lack of eCG in Group I caused this protocol to be less efficacious in induction and synchronization of estrus and ovulation. The Control Group had a greater synchronization of estrus and ovulation.