Eficiencia de parches de estro (Estrotec) sobre la tasa de preñez en protocolo de IATF en hembras bovinas doble propósito.

Abstract

The study was carried out at the LA LEY farm in the San Faustino district of the San José de Cúcuta municipality, with a batch of 200 females with a racial component of Holstein (red and black), Gyr, Guzerat, Swedish Red, Swiss Brown, Jersey and Simmental, the animals were previously prepared with purge, vitamins, minerals, organic modifiers, mineralized salt and forage available from the farm. They were organized in two groups, lot one with 100 cows to which a conventional IATF protocol was implemented plus the estrous indicator patch (ESTROTEC®), taking into account the condition that the females that their respective patch was not activated A dose of GnRH (2 ml) will be applied, in order to induce ovulation; in batch two, 100 cows were worked without the use of a patch using the conventional IATF protocol. The conventional IATF protocol consisted of the application of (2) ml of estradiol benzoate and the DIB (bovine intra vaginal device) on day (0), on day (8) (2) ml of prostaglandin plus (2) ml of eCG (Equine Chorionic Gonadotropin), the DIB is also removed and the "Estrotec®" patch is placed on the base of the tail, on day (9), apply (1) ml of estradiol benzoate and on day (10) proceed inseminate at (48-56) hours. The results of the investigation showed a pregnancy percentage of 65% for batch number one where the Estrotec® patch was used and in batch number two where no patch was used, the pregnancy rates were 45%.