Avaliação da eficiência de reutilização do CIDR® em protocolos de superovulação de ovelhas / Evaluation of efficiency of the reuse of CIDR® in sheep superovulation protocols

ABSTRACT

Sheep farming is an area of veterinary medicine of great importance at regional and national level, among the easily found breeds of economic relevance in northeastern Brazil are Morada Nova and Santa Inês. In addition, ultrasonography has been used systematically in animals superovulatory response to the sheep supervoulation protocols. In order to assess, based on the number of yellow bodies and number of viable embryos produced, the efficiency of the reuse of CIDR® in superovulation protocols in sheep using ultrasonography in color Doppler mode, a superovulatory protocol was performed in a total 40 sheep, with G-USED when 10 Morada Nova ewes and 10 Santa Inês ewes received reused CIDR® and G-NOVO when 10 Morada Nova ewes and 10 Santa Inês ewes received new CIDR®. The mean and standard error of yellow bodies was 10.35±1.33 for G-USED and 9.25±1.65 for G-NOVO, while the number of viable embryos was 6.50±2, 54 for G-USED and 8.25±1.49 for G-NEW. Thus, the reuse of CIDR® demonstrated efficiency in superovulation and did not interfere with the development of corpus luteum and the production of quality transferable embryos in sheep.