Prolonged preinsemination anestrus in gilts and practic [i.e. practical] solvent possibility. [M.Sc. thesis] | Prolongirana preinseminaciona anestrija u nazimica i mogucnosti prakticnog resavanja. Magistarska teza
2008
Bosnjak, D.V.
In intensive contemporary production, gilts should manifest the appearance of the first estrus between 6 to 7 months of age. In case the estrus is not discovered even after 8 months of age, it is considered that the gilt is demonstrating prolonged pre-insemination anestrus. Gilts with durable anestrus are extracted for further reproduction, which significantly decreases the production efficiency of farrows, from a natural and economic viewpoint. The aim of this thesis to give answers to two basic questions: 1) Is the estrus, in these gilts, undiscovered because they, until over 8 months of age, have not actually established pubertal ovarian activity, or is it the consequence of inadequate technological discoveries of the estrus? and 2) is it possible to achieve with the application of contemporary biotechnological methods, a satisfactory degree of estrual reaction and successful conception in these gilts? The derived results clearly show that inadequate technology in revealing estrus is the primary reason for the absence in manifestations of the outer signs of the estrus, so that applications of contemporary methods of hormonal treatment or adequate technology for discovering estrus, may significantly increase the degree of estral reaction and successful conception in gilts with prolonged pre-inseminational anestrus.
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