Surveillance and management of estrous cycle in Awassi and Lacaune ewes during out of season
Abstract
The purpose of this study was to increase fertility in sheep by applying modern biotechnology: induction and synchronization of estrous in non- breeding season. The ewes were divided into 3 equal batches. In all batches intravaginal sponge (Veramix/Intervet) containing 60 mg of MPA was left in the vagina for 14 days. Immediately after removal of the sponge an injections of prostaglandin (Dinolytic/Pfizer) at the dose of 12.5 mg (2,5ml)/animal was administered in batch II. Batch III received two injections: PMSG hormone (Folligon/Intervet) at the dose of 500 IU/animal and prostaglandin (Dinolytic/Pfizer) at the dose of 12.5 mg (2,5 ml)/animal. The research focused on several directions: assessment of estrous manifestation; occurrence of estrous interval after completion of hormonal therapy; duration of estrous; appreciation of gestation after the first and second estrous clinically manifested; percentage of fecundity. From the results obtained it follows that induction and synchronization of estrous in non-breeding season showed economic advantages by shortening the time needed for the installation of gestation, the possibility of lambing distribution, preparation and organization of mating.
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